Friday, February 8, 2013

Bones of the arm and hand


1. HUMERUS - Upper arm bone; the large head of the humerus is rounded and joins with the glenoid fossa of the scapula to form the shoulder joint. 

2. ULNA - medial lower arm bone; the proximal bony process of the ulna at the elbow is called the olecranon (elbow bone). the olecranon is the bony joint of the elbow when the elbow is bent. 

3. RADIUS - lateral lower arm bone in with the thumb

4. CARPALS - wrist bones; there are two rows of four bones in the wrist

5. PHALANGES - (singular; phalanx) finger bones; each finger except the thumb has three phalanges; a proximal, a middle, and a distal phalanx. the thumb has only two phalanges; a proximal and a distal phalanx.