Читать книгу Anatomy and Embalming - Charles Otto Dhonau - Страница 62

—The Shoulder girdle consists of the clavicle and scapula.

The Clavicle.—The clavicle or key bone, so-called because of its supposed resemblance to the key used by the Romans, forms the anterior portion of the shoulder girdle. It is often commonly called the collar bone.

The Scapula.—The scapula comes from a Greek word meaning “a spade.” It forms the back part of the shoulder girdle.

The arm is that portion of the upper extremity which is situated between the shoulder and the elbow.

The Humerus.—This is the largest and strongest bone of the upper extremity and is found in the arm between the shoulder and the elbow. It is the only bone in the arm.

The fore arm is that portion of the upper extremity which is situated between the elbow and the wrist. The fore arm has two bones, the ulna and the radius.

The Ulna.—A long thin bone, but larger than the radius, and situated on the inside of the fore arm.

The Radius.—So-called because it is the rotary bone of the fore arm. It is situated on the outside of the fore arm and parallel with the ulna.

The hand is subdivided into the wrist or carpus bones, the metacarpus or the bones of the palm, and the phalanges or the bones of the digits. There are twenty-seven bones in each hand.