Atlas Of Human Anatomy For The Artist - The Humerus, Bone Of The Upper Arm

Front 1

Humerus

Back 1

Bone of the upper arm, longest, heaviest bone of the upper limb, 13 in. long or half again the height of the skull, consists of narrow shaft enlarged at each articular end

Front 2

Proximal end of the humerus

Back 2

Composed of head and tubercles

Front 3

Head of the humerus

Back 3

Smooth, half-sphere looking somewhat backward to articulate with the should blade (ball-and-socket joint)

Front 4

Major and minor tubercles of the humerus

Back 4

Flank the head in front

Front 5

Intertubercular groove

Back 5

Separates the major and minor tubercles

Front 6

Shaft of the humerus

Back 6

Suggests and S-curve - especially in its lower half which arches backward

Front 7

Deltoid tuberosity

Back 7

Midway down the shaft (attachment for the deltoid muscle)

Front 8

Distal end of the humerus

Back 8

Broad plate, modified so as to articulate in a special way with each of the forearm bones, most directly associated with the ulna (inner arm bone)

Front 9

Trochlea

Back 9

Oblique spool on which the ulna swings up and down (hinge joint)

Front 10

Capitulum

Back 10

Provides articulation for the radius (outer forearm bone), ball-shaped surface upon which the indented head of the radius may glade and revolve (converse ball-and-socket joint)

Front 11

Olecranon fossa

Back 11

Receives the rear (olecranon) process of the ulna in full backward extension

Front 12

Medial epicondyle

Back 12

Most prominent in both skeleton and live subject, when arm hangs at side, projection is found at or below the lowest margin of the rib cage

Front 13

Lateral epicondyle

Back 13

At the bottom of a pit in the fully extended, fleshy elbow, protruding itself only in flexion