humerus
upper arm bone
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
The humerus (Figs. 207, 208) is the longest and largest bone of the upper extremity; it is divisible into a body and two extremities.
1 ...
Humerus the bone in the upper arm
(humer = the shoulder)
Humidity water vapor in the air
(humid = moist‚ moisture) ...
humerus
thoracoacromial trunk
lateral pectoral nerve and medial pectoral nerve ...
The humerus is joined to the pectoral girdle at a joint and is held in place by muscles and ligaments. A dislocated shoulder occurs when the end of the humerus slips out of the socket of the scapula, stretching ligaments and muscles.
Hinge joints, such as the elbow (between the humerus and the ulna). These joints act like a door hinge, allowing flexion and extension in just one plane.
Pivot joints, such as the elbow (between the radius and the ulna).
origin to a large area of bone; in this case, the humerus
At its other end, the insertion, it tapers into a glistening white tendon which, in this case, is attached to the ulna, one of the bones of the lower arm.
The largest portion of the radius is at the wrist joint where it articulates with the carpal bones of the hand. Above, the radius articulates with the humerus at the elbow joint.
They retain many characters of their therapsid ancestors, such as laying eggs, limbs oriented with humerus and femur held lateral to body (more lizard-like), a cloaca, skulls with an almost birdlike appearance, and a lack of teeth in adults.
 See also: Human, Bone, Joint, Anatomy, Trans
  
|
RSS
