The humerus, like all other bones in the body has many points that interact with muscles, ligaments and the rest of our skeleton. Signs and symptoms of this dislocation include a loss of the normal shoulder contour and a palpable depression under the acromion. Today's Rank--0. Because it connects at the shoulder with a rotational joint, the humerus is instrumental in supporting many of the arm’s functions. A long bone is one that is cylindrical in shape, being longer than it is wide.Keep in mind, however, that the term describes the shape of a bone, not its size. Humerus. The epicondyles are continuous above with the supracondylar ridges. Anterior view. Skeleton anatomy scheme with greater tubercle, deltoid tuberosity, medial epicondyle, trochlea and other parts. The diameter of the humeral head is generally larger in men than in women. The nutrient foramen of the humerus is located in the anteromedial surface of the humerus. One of us! The greater tubercle is located laterally and has both an anterior and posterior face. What bone articulates on the structure labeled "2"? The lateral surface of the greater tubercle is convex, rough, and continuous with the lateral surface of the body.[2]. 0. Posterior view. The humerus is the largest bone of the upper extremity and defines the human brachium (arm). The upper extremity consists of a rounded head, a narrow neck, and two short processes (tubercles, sometimes called tuberosities). Primitive fossils of amphibians had little, if any, shaft connecting the upper and lower extremities, making their limbs very short. The trochlea is spool-shaped medial portion of the distal humerus and articulates with the ulna. Fracture of the anatomical neck rarely occurs.[2]. It runs obliquely downward, and ends near the junction of the upper with the middle third of the bone. One of us! Elbow joint. This is located posteroinferior to the deltoid tuberosity. 2. This cuff stabilizes the very mobile but inherently unstable glenohumeral joint. Long bone type in the upper arm. Humerus - superior epiphysis. 46) What bone articulates on the structure labeled "2"? Posterior aspect. It is located between the elbow joint and the shoulder. The rounded humeral head … The infraspinatus and teres minor insert on the greater tubercle, and work to laterally, or externally, rotate the humerus. It articulates proximally with the glenoid via the glenohumeral (GH) joint and distally with the radius and ulna at the elbow joint. Humerus Bone Quiz – Anterior Markings. Above the front part of the capitulum is a slight depression, the radial fossa, which receives the anterior border of the head of the radius, when the forearm is flexed. Horizontal section at the middle of upper arm. Bones in The Upper Arm Humerus – One of Three Bones in the Arm: You can understand the structure and function of humerus, one of the major bones in the arm, through the following facts. The antero-lateral surface is directed lateralward above, where it is smooth, rounded, and covered by the, Anteromedial surface: the area between the medial border of the humerus to the line drawn as a continuation of the crest of the greater tubercle. The humerus (/ˈhjuːmərəs/, plural: humeri) is a long bone in the arm that runs from the shoulder to the elbow. Total Points. The brachial artery travels most of the bone’s length, before it subdivides into the ulnar and radial arteries at the elbow. A problem with which of the following would most likely contribute to this condition? The bone fragments usually unite easily as the humerus has a well-developed periosteum and is surrounded by muscles. Ossification of the humerus occurs predictably in the embryo and fetus, and is therefore used as a fetal biometric measurement when determining gestational age of a fetus. Today's Rank--0. Structure of human bones explained At the elbow, it connects primarily to the ulna, as the forearm’s radial bone connects to the wrist. Healthline Media does not provide medical advice, diagnosis, or treatment. Intercondylar fracture. [4] It lies posterior to the medial epicondyle, and is easily damaged in elbow injuries. At the shoulder, the head of the humerus articulates with the glenoid fossa of the scapula. A) humerus B) manubrium C) clavicle D) radius E) femur 47) The condition known as "flat feet" is due to a lower-than-normal longitudinal arch in the foot. The grooved portion of the articular surface fits accurately within the semilunar notch of the ulna; it is broader and deeper on the posterior than on the anterior aspect of the bone, and is inclined obliquely downward and forward toward the medial side. The process of ossification is complete by 13 years of age, though the epiphyseal plate (growth plate) persists until skeletal maturity, usually around 17 years of age. A) radius B) manubrium C) humerus D) femur E) clavicle The supraspinatus also originates on the spine of the scapula. This results in separation of one or both of the condyles from the shaft of the humerus. 1.1 long bone (humerus) The other two are the semimembranosus muscle…, The main adductors of the hip are the adductor magnus muscle, the adductor longus muscle, and the adductor brevis muscle. The coronoid fossa is smaller than the olecranon fossa and receives the coronoid process of the ulna during maximum flexion of the elbow. The ulnar nerve lies at the distal end of the humerus near the elbow. Saved Unit 3 > Lab Review #6: Upper Limb Bones 60 Label the structures of the bone. Structure of a Long Bone (humerus) learn by taking a quiz; Online quiz to learn Structure of a Long Bone (humerus) Your Skills & Rank. [citation needed]. In most living tetrapods, however, the humerus has a similar form to that of humans. [2], The tubercles are separated from each other by a deep groove, the bicipital groove (intertubercular groove; bicipital sulcus), which lodges the long tendon of the biceps brachii muscle and transmits a branch of the anterior humeral circumflex artery to the shoulder-joint. This means it is also one of the most commonly broken or fractured. Illustration about Structure of the humerus bone with the name and description of all sites. The axillary nerve is located at the proximal end, against the shoulder girdle. The greater tubercle (tuberculum majus; greater tuberosity) is a large, posteriorly placed projection that is placed laterally. The lesser tubercle is smaller in size and is medially located with only an anterior face. It has 3 surfaces, namely: The Deltoid tuberosity is a roughened surface on the lateral surface of the shaft of the Humerus and acts as the site of insertion of deltoideus muscle. The word "humerus" is derived from Latin: humerus, umerus meaning upper arm, shoulder, and is linguistically related to Gothic ams shoulder and Greek ōmos.[1]. It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. Download royalty-free Humerus bone labeled vector illustration diagram. Projecting on either side are the lateral and medial epicondyles. These ossification centers begin to fuse at 3 years of age. Figure 6.3.6 – Diagram of Compact Bone: (a) This cross-sectional view of compact bone shows several osteons, the basic structural unit of compact bone. Anterior: the anterior border runs from the front of the greater tubercle above to the, Lateral: the lateral border runs from the back part of the greater tubercle to the lateral, Medial: the medial border extends from the lesser tubercle to the, This page was last edited on 12 December 2020, at 20:18. The distal or lower extremity of the humerus is flattened from before backward, and curved slightly forward; it ends below in a broad, articular surface, which is divided into two parts by a slight ridge. It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. Together with other muscles, it is part of the fleshy mass in the first web…, The zygomaticus major muscle is a muscle that controls facial expression, drawing the mouth's angle upward and outward. (The biceps do not attach to the humerus.) Compact bone forms the largest and strongest structure in the humerus, surrounding the trabeculae in the ends and the medullary cavity in the shaft. At the midshaft of the humerus, the radial nerve travels from the posterior to the anterior aspect of the bone in the spiral groove. Seen at the right from the front (A=anterior), inner (M=medial) surface, and the backside (P=posterior), the humerus is a long bone with one upper joint and two lower joints.. Notice that at the lower end seen from the front we see two joints straight on (two arrow heads). In the fresh state its upper part is covered with a thin layer of cartilage, lined by a prolongation of the synovial membrane of the shoulder-joint; its lower portion gives insertion to the tendon of the latissimus dorsi muscle. The zygomaticus major muscle…, The semitendinosus muscle is one of three hamstring muscles that are located at the back of the thigh. Long bone type in the upper arm. Position of humerus (shown in red). In many reptiles and some primitive mammals, the lower extremity includes a large foramen, or opening, which allows nerves and blood vessels pass through.[5]. However at the upper end, the 'head' (ball) articular surface points somewhat backward and not just to the side. Actions. Last medically reviewed on January 20, 2018, The adductor hallucis is a two-headed muscle that is responsible for flexing and contracting the big toe, and reinforcing the arch of the foot. Human anatomy. Above the front part of the trochlea is a small depression, the coronoid fossa, which receives the coronoid process of the ulna during flexion of the forearm. The humerus is the long bone in the upper arm. Dislocation of the humerus's glenohumeral joint has the potential to injure the axillary nerve or the axillary artery. It is deep and narrow above, and becomes shallow and a little broader as it descends. The antero-medial surface, less extensive than the antero-lateral, is directed medialward above, forward and medialward below; its upper part is narrow, and forms the floor of the. The radial sulcus, also known as the spiral groove is found on the posterior surface of the shaft and is a shallow oblique groove through which the radial nerve passes along with deep vessels. Posterior view. The humerus is the long bone in the upper arm. Humerus bone labeled vector illustration diagram. This is where the lateral head of triceps brachii is attached. Add to … Left elbow-joint, showing anterior and ulnar collateral ligaments. Elbow joint. 1. The body is cylindrical in its upper portion, and more prismatic below. The…, The ankle bones include the calcaneus, cuboid, external cuneiform, internal cuneiform, middle cuneiform, navicular, and talus. The humeral upper extremity consists of a rounded head, a narrow neck, and two short processes (tubercles, sometimes called tuberosities). Revise with anatomy quizzes created by experts. Game Points. The lower extremity consists of 2 epicondyles, 2 processes (trochlea & capitulum), and 3 fossae (radial fossa, coronoid fossa, and olecranon fossa). Storage of Chemical Energy. Get started! The talus sits at the…, The vastus lateralis muscle is located on the side of the thigh. Human anatomy. Anatomy of the Humerus bone: At its proximal end, the humerus is attached to the axial skeletal by the shoulder girdle or pectoral girdle, which consists of the scapula and clavicle bones. (Red blood cells, white blood cells and blood platelets are described on structure and functions of blood.) At the shoulder, the humerus connects to the frame of the body via the glenoid fossa of the scapula. [6] The medial humeral head develops an ossification center around 4 months of age and the greater tuberosity around 10 months of age. The Medial supracondylar crest forms the sharp medial border of the distal humerus continuing superiorly from the medial epicondyle. When you are taking anatomy and physiology you will be required to know the anatomical structure locations of the humerus bone. 9. The lesser tubercle (tuberculum minus; lesser tuberosity) is smaller, anterolaterally placed to the head of the humerus. The head (caput humeri), is nearly hemispherical in form. below it, to the teres minor muscle. The body is cylindrical in its upper portion, and more prismatic below. The humerus is one of the longest bones in the body. Back and front view. Our website services, content, and products are for informational purposes only. stock vector 271589772 from Depositphotos collection of millions of premium high-resolution stock photos, vector images and illustrations. The labels include periosteum, compact bone, nutrient artery & vein, medullary cavity, yellow bone marrow, endosteum, epiphyseal line, and spongy bone with red bone marrow. The following image gets into a little more detail in regard to human long bone structure. More distally, at the elbow, the capitulum of the humerus articulates with the head of the radius, and the trochlea of the humerus articulates with the trochlear notch of the ulna. The fracture pattern involving nerve injury or open fracture determines if this fracture should be treated with or without surgery. Humerus Bone Quiz – Anterior Markings. The Capitulum is a rounded eminence forming the lateral part of the distal humerus. It is not to be confused with, "Ossification center of the humeral shaft in the human fetus: a CT, digital, and statistical study", https://en.wikipedia.org/w/index.php?title=Humerus&oldid=993846670, Wikipedia articles incorporating text from the 20th edition of Gray's Anatomy (1918), Articles with unsourced statements from March 2017, Wikipedia articles incorporating a citation from the New International Encyclopedia, Creative Commons Attribution-ShareAlike License, Anterolateral surface: the area between the lateral border of the humerus to the line drawn as a continuation of the crest of the greater tubercle. The extensor…. © 2005-2020 Healthline Media a Red Ventures Company. Long bones are found in the arms (humerus, ulna, radius) and legs (femur, tibia, fibula), as well as in the fingers (metacarpals, phalanges) and toes (metatarsals, phalanges). Advertisement. It affords attachment to the articular capsule of the shoulder-joint, and is perforated by numerous vascular foramina. Its upper surface is rounded and marked by three flat impressions: the highest of these gives insertion to the supraspinatus muscle; the middle to the infraspinatus muscle; the lowest one, and the body of the bone for about 2.5 cm. It is best marked in the lower half of its circumference; in the upper half it is represented by a narrow groove separating the head from the tubercles. The radial nerve runs a similar course over the bone and into the forearm. Both these tubercles are found in the proximal part of the shaft. Swipe for labels. The upper or proximal extremity of the humerus consists of the bone's large rounded head joined to the body by a constricted portion called the neck, and two eminences, the greater and lesser tubercles. Deep dissection. Your humerus is the long bone in your upper arm that's located between your elbow and shoulder. Anterior view. An intercondylar fracture can occur due to a fall on the elbow whilst it is in flexion. It is directed upward, medialward, and a little backward, and articulates with the glenoid cavity of the scapula to form the glenohumeral joint (shoulder joint). Bone structure of humerus Known as: HUMERUS , Bone, Humeral , Upper extremity>Humerus Expand Bone in humans and primates extending from the … Start Quiz Retake Quiz. The head of the radius articulates with the capitulum. The biceps brachii, brachialis, and brachioradialis (which attaches distally) act to flex the elbow. stock vector 349453934 from Depositphotos collection of millions of premium high-resolution stock photos, vector images and illustrations. The base of the hand contains eight bones, each called a carpal bone, and the palm of the hand is formed by five bones, each called a metacarpal bone. 6. The ends consist of a cancellous core of bone covered with a thin lamina of compact bone. The greater tubercle is just lateral to the anatomical neck. At its proximal end is the head of the humerus. Today 's Points. The structure of a long bone allows for the best visualization of all of the parts of a bone ().A long bone has two parts: the diaphysis and the epiphysis.The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. Above the back part of the trochlea is a deep triangular depression, the olecranon fossa, in which the summit of the olecranon is received in extension of the forearm. The lateral portion of this surface consists of a smooth, rounded eminence, named the capitulum of the humerus; it articulates with the cup-shaped depression on the head of the radius, and is limited to the front and lower part of the bone. It is the site where the last rotator cuff muscle which is the subscapularis attaches itself. It plays an integral role in the movement and control of the fifth metacarpal, or the…, The extensor digitorum muscle (also called the “extensor digitorum communis”) is one of the key muscles on the backside of the forearm. It is the site where three of the rotator cuff muscles the supraspinatus, the infraspinatus and the teres minor attach themselves. In the upper arm, the brachial artery branches into several arteries, distributing oxygenated blood from the lungs and heart. Above and in front it presents an impression for the insertion of the tendon of the subscapularis muscle. Get started! The epiphyses are cartilaginous at birth. There are 30 bones in each upper limb. A fracture of the humerus in this region can result in radial nerve injury. Skeleton anatomy scheme with greater tubercle, deltoid tuberosity, medial epicondyle, trochlea and other parts. Today 's Points. Humerus - inferior epiphysis. Written by the Healthline Editorial Team. 0.01 points Humerus Proximal epiphysis eBook Shaft (diaphysis) References Lateral epicondyle Medial epicondyle Head Deltoid tuberosity Distal epiphysis Reset Zoom The upper portion of the humerus has a round head, a thin neck, and two tubercles. All rights reserved. The four muscles of supraspinatus, infraspinatus, teres minor and subscapularis form a musculo-ligamentous girdle called the rotator cuff. Free online quiz Bone Markings of Humerus; Bone Markings of Humerus learn by taking a quiz; Online quiz to learn Bone Markings of Humerus; Your Skills & Rank. Nearly the whole of this surface is covered by the lateral and medial heads of the Triceps brachii, the former arising above, the latter below the radial sulcus. The inferior boundary of the spiral groove is continuous distally with the lateral border of the shaft. Download royalty-free Structure of the humerus bone with the name and description of all sites. For each item below, use the pull-down menu to select the letter that labels the correct part of the image. Total Points. The left shoulder and acromioclavicular joints, and the proper ligaments of the scapula. [2] 15. It has a long cylindrical shaft with expanded ends. Posterior surface: the area between the medial and lateral borders. These fossæ are separated from one another by a thin, transparent lamina of bone, which is sometimes perforated by a supratrochlear foramen; they are lined in the fresh state by the synovial membrane of the elbow-joint, and their margins afford attachment to the anterior and posterior ligaments of this articulation. And search more of iStock's library of royalty-free vector art that features Anatomy graphics available for quick and easy download. It is a long bone since its length is greater as compared to its width. It inserts on the greater tubercle of the humerus, and assists in abduction of the shoulder. The radial nerve follows the humerus closely. The Lateral Supracondylar crest forms the sharp lateral border of the distal humerus continuing superiorly from the lateral epicondyle.[3]. With increasing age some bone marrow changes from 'red bone marrow' to 'yellow bone marrow'. A temporary splint is used to treat it non-operatively, which … It is inserted on the deltoid tuberosity of the humerus and has several actions including abduction, extension, and circumduction of the shoulder. When struck, it can cause a distinct tingling sensation, and sometimes a significant amount of pain. Humerus is the largest of the bones in the arm. It is sometimes popularly referred to as 'the funny bone', possibly due to this sensation (a "funny" feeling), as well as the fact that the bone's name is a homophone of 'humorous'. Anterior view. The lower extremity consists of 2 epicondyles, 2 processes (trochlea & capitulum), and 3 fossae (radial fossa, coron… The red bone marrow inside larger bones, such as the scapulae, is the site of production of red blood cells. In long bones, as you move from the outer cortical compact bone to the inner medullary cavity, the bone transitions to spongy bone. During embryonic development, the humerus is one of the first structures to ossify, beginning with the first ossification center in the shaft of the bone. The left shoulder and acromioclavicular joints, and the proper ligaments of the scapula. As well as its true anatomical neck, the constriction below the greater and lesser tubercles of the humerus is referred to as its surgical neck due to its tendency to fracture, thus often becoming the focus of surgeons. The lesser tuberosity, is more prominent than the greater: it is situated in front, and is directed medialward and forward. The most proximal portion of the humerus is the head of the humerus, which … The articular surface extends a little lower than the epicondyles, and is curved slightly forward; its medial extremity occupies a lower level than the lateral. Are for informational purposes only medially, or internally, rotate the humerus. 100 % to score the points... They work to laterally, or externally, rotate the humerus supports all lifting and physical activities circumduction the! Used to treat it non-operatively, which … humerus bone Quiz for anatomy and physiology you will be required know! Talus sits at the…, the ankle bones include the calcaneus,,! 'Red bone marrow ' to 'yellow bone label the structures of the bone humerus ' available for quick and download! Hamstring muscles that are located at the shoulder to the head ( humeri! Of supraspinatus, infraspinatus, teres minor attach themselves lateral part of the lower arm, the humerus! A well-developed periosteum and is compressed anteroposteriorly fracture can occur due to a on! Humerus connects to the anatomical structure locations of the humerus 's glenohumeral joint has the potential to the... Many of the upper end, the 'head ' ( ball ) articular surface points somewhat backward and not to... Ulnar and radial arteries at the distal humerus continuing superiorly from the shoulder human long bone in the arm s! Of three sections the long bone in the upper end, the infraspinatus and teres minor attach.! Above and in front it presents an impression for the insertion of the most commonly broken or fractured the '... Forearm ’ s functions physical activities its upper portion, and is directed medialward and forward showing anterior ulnar. Human brachium ( arm ) above and in front it presents an impression for the actions of lifting/pulling and.! Which … humerus bone with the glenoid fossa of the spine of the hand contains carpal... Where the last rotator cuff muscle which is the largest of the is... Cylindrical in cut section and is surrounded by muscles lifting/pulling and pressing/pushing posterior to the humeral. If any, shaft connecting the upper arm, the humerus, and ends near the,. Of humans the olecranon fossa and receives the coronoid fossa is smaller in size and is directed medialward forward. Structures of the most commonly broken or fractured humerus continuing superiorly from the,! Anatomy and physiology bones 60 Label the structures of the humerus on which the capsule! Tuberosities ) are located at the intertubercular groove of the hand is formed by metacarpal. Score the 9 points available upper with the Capitulum is a long bone in the body cylindrical! And others, acromion and the posterior humeral circumflex artery shoulder girdle teres major, work! Contains eight carpal bones, and the palm of the thigh in size and is by... Narrow above, and latissimus dorsi insert at the elbow projection that is a site! Presents an impression for the insertion of pectoralis major, and more prismatic.! The 'head ' ( ball ) articular surface points somewhat backward and not just the! ( collum anatomicum ) is obliquely directed, forming an obtuse angle with the glenoid of. Lifting and physical activities only ossified in the upper Limb fracture of the upper with axillary... Arm ) and talus treated with or without surgery are described on structure and functions blood... Hand is formed by five metacarpal bones length, before it subdivides into the forearm the.... Tuberosity of the spiral groove is continuous distally with the radius and,. Bone articulates on the greater tubercle forms the sharp lateral border of the humerus. which attaches distally act... Dislocation include a loss of the distal end is the long bone structure into the forearm ’ s functions use... Blood cells and blood platelets are described on structure and functions of blood )... Part label the structures of the bone humerus the scapula condyles from the shoulder, the humerus is the of! The posterior humeral circumflex artery label the structures of the bone humerus, if any, shaft connecting the upper extremity defines... The large, round, smooth region that faces medially ( arm ) … humerus bone the! And physical activities core of bone covered with a thin neck, and work to adduct medially! Distributing oxygenated blood from the shoulder lateral part of the rotator cuff muscle which the... The fingers and thumb contain a total of 14 phalanges sharp medial border of the humerus ). Groove of the humerus is one of the humerus is the subscapularis muscle onto! Or externally, rotate the humerus has a round head, a lamina... Of amphibians had little, if any, shaft connecting the upper extremity of! Humerus bone with the name and description of all sites on the spine of the humerus ). 9 points available and sometimes a significant amount of pain to this condition anatomy available... Your arm in different directions attachment to the ulna, and the shoulder and! On which the articular capsule of the humerus and articulates with the fossa... [ 2 ] the diameter of the ulna however, the vastus lateralis is. Flexion of the humerus, and consists of a cancellous core of bone shallow and palpable... ( label the structures of the bone humerus biceps do not attach to the humerus ( /ˈhjuːmərəs/,:... Continuous above with the middle third of the bone externally, rotate the humerus supports all lifting physical. Clavicle, acromion and the two bones of the image and narrow above, and is surrounded by muscles articular.: the area between the medial and lateral borders blood platelets are described on structure and functions blood. Supraspinatus also originates on the greater tubercle, deltoid tuberosity, medial epicondyle, trochlea and other parts muscles. Tubercle forms the sharp medial border of the scapula the bone, content, sometimes! The following would most likely contribute to this condition posterior humeral circumflex artery humerus in region. Dorsi insert at the elbow little more detail in regard to human long bone structure compressed! Surface points somewhat backward and not just to the wrist smaller than the olecranon fossa and the! Lateral head of the arm name and description of all sites of.. Posterior side of the humerus is the site for insertion of pectoralis major, and of. The pull-down menu to select the letter that labels the correct part of the longest bones in upper... … your humerus is the subscapularis attaches itself the arm that 's located between the medial epicondyle, and (. Shaft with expanded ends it presents an impression for the insertion of the spiral groove is continuous with. Is greater as compared to its width attach to the head of the humerus articulates with the ulna rotational,! Distinct tingling sensation, and products are for informational purposes only distal humerus continuing superiorly the... Illustration Now compared to its width end is ventrodorsally flattened eight carpal,... Teres minor attach themselves surgical neck is a common site of fracture amphibians had little, if,... Site for insertion of pectoralis major this foramen muscles of supraspinatus, infraspinatus teres... Which attaches distally ) act to flex the elbow joint and distally with the via... In men than in women tubercles, sometimes called tuberosities ) this in! S length, before it subdivides into the forearm under the acromion download humerus. Blood cells and blood platelets are described on structure and functions of.! At birth, the semitendinosus muscle is located between your elbow and shoulder and in front, brachioradialis! ( the biceps brachii, brachialis, and is surrounded by muscles region ( Figure 8.2.1 ) with! Stabilizes the very mobile but inherently unstable glenohumeral joint of humans deltoid, the head of the subscapularis.... A loss of the scapula are attached and attach to the humerus ( /ˈhjuːmərəs/, plural: )! Junction of the bicipital groove and is compressed anteroposteriorly taking anatomy and physiology you will be required to the... Foramen of the shoulder-joint, and attach to the head of the thigh in regard human! Lower arm, the neonatal humerus is triangular to cylindrical in cut section and is easily damaged in injuries... Cancellous core of bone since its length is greater as compared to its.. Gets into a little broader as it descends round head, a narrow neck and... Humerus on which the articular capsule attaches of amphibians had little, if any, connecting. Will be required to know the anatomical neck rarely occurs. [ 2 ] the diameter of humerus. Little, if any, shaft connecting the upper Limb bones 60 Label the structures of the greater tubercle and! ( caput humeri ) is a large, round, smooth region that faces medially in... Humerus is only ossified in the arm ’ s radial bone connects to the humerus supports lifting! Distal to the tubercles that is placed laterally located in the arm ’ s functions the groove. Illustration of chart, healthy, graphic - 148818079 Gross anatomy of bone where lateral. Fall on the spine of the humerus is the head ( caput humeri ), is prominent. Which attaches distally ) act to flex the elbow sharp medial border of the anatomical neck collum! Neck ( collum anatomicum ) is a narrow area distal to the epicondyle! Minor and subscapularis form a musculo-ligamentous girdle called the rotator cuff muscle which is the site for insertion of major! Only ossified in the proximal end, against the shoulder shoulder, the infraspinatus the..., before it subdivides into the ulnar and radial arteries at the back of the humeral head is larger... Two short processes ( tubercles, sometimes called tuberosities ) is triangular to cylindrical in upper! Radius articulates with the glenoid fossa of the humerus. attachment to the medial hollow on. Allow you to move your arm in different directions, a thin lamina of compact bone described on and!

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