Descriptive Anatomy comprises a detailed account of the numerous organs of which the body is formed, especially with reference to their outward form, their internal structure, the mutual relations they bear to each other, and the successive conditions they present during their development.

Surgical Anatomy is, to the student of medicine and surgery, the most essential branch of anatomical science, having reference more especially to an accurate knowledge of the more important regions, and consisting in the application of anatomy generally to the practice of surgery.

Fracture of the patella may be produced by muscular action or by direct violence. When produced by muscular action, it occurs thus: a person in danger of falling forwards attempts to recover himself by throwing the body backwards, and the violent action of the quadriceps extensor upon the patella snaps the bone transversely across.

The arteries are found in nearly every part of the animal body, with the exception of the hairs, nails, and epidermis; and the larger trunks usually occupy the most protected situations, running, in the limbs, along the flexor side, where they are less exposed to injury.