Or'gan. Any part, or member, that has some specific function, or duty, by which some one of the body's activities is carried on; for example, the eye is the organ of vision, the liver is one of the organs of digestion.

Tho'rax. The cavity of the trunk immediately above the diaphragm.

Tis'sue (tĭsh'ū). A fabric, or texture, composed of cells and cell-products of one kind; as, for example, nervous tissue, muscular tissue, fatty tissue.

Se cre'tion. A substance made from the blood, the special character of which depends upon the kind of gland that makes, or secretes, it.

II. Relating to the Digestive System

Al i men'ta ry ca nal'. The food tube, or digestive tube, extending from lips and nose to the end of the rectum, with its various branches and attachments.

Bile. A yellow, bitter, alkaline liquid secreted by the liver, and especially valuable in the digestion of fats; sometimes called gall.

Co'lon. The large intestine.

Di ges'tion. The process in the body by which food is changed to the form in which it can pass from the alimentary canal to the blood vessels and lymphatics.