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axial part of the system and its principal ganglions and nerves are situated in the body cavity and form a chain of ganglions on each side of the vertebral column connected with numerous other ganglions and nerve plexuses.

A plug introduced into a natural or artificial cavity of the body in order to arrest hemorrhage, or for the application of medicine.

A cavity or pouch beneath the lower eyelid of most deer and antelope; the lachrymal sinus; larmier. It is capable of being opened at pleasure and secretes a waxy substance.

The cavity or ventricle of the thalamencephalon; the third ventricle.

The operation of puncturing the chest wall so as to let out liquids contained in the cavity of the chest.

e thorax; especially, the operation of removing the ribs, so as to obliterate the pleural cavity in cases of empyema.

The operation of opening the pleural cavity by incision.

The part of the trunk between the neck and the abdomen, containing that part of the body cavity the walls of which are supported by the dorsal vertebræ, the ribs, and the sternum, and which the heart and lungs are situated; the chest.

A shell longer than a deck-piercing shell, with thinner walls and a larger cavity for the bursting charge, which consists of about 130 pounds of high explosive. It has no soft cap, and is intended to effect its damage by the powerful explosion which follows on slight resistance. It is used chiefly in 12-inch mortars.…

system of another; also, the introduction of any fluid into the blood vessels, or into a cavity of the body from which it can readily be adsorbed into the vessels; intrafusion; as, the peritoneal transfusion of milk.

An intrusion of one vegetable cell into the cavity of another, sometimes forming there an irregular mass of cells. Goodale.

A fold of the wall which projects into the cavity of the intestine in bivalve mollusks, certain annelids, starfishes, and some other animals.

orance. He was then in happy unacquaintance with everything connected with that obnoxious cavity. Sir W. Hamilton.

Having one cell or cavity only; as, a unilocular capsule or shell.

nous partitions, flaps, or folds, which permit the passage of the contents of a vessel or cavity in one direction, but stop or retard the flow in the opposite direction; as, the ileocolic, mitral, and semilunar valves.

A fissure, cleft, or cavity, as in the earth or other substance. "Down to the veins of earth." Milton. Let the glass of the prisms be free from veins. Sir I. Newton.

The belly; the abdomen; -- sometimes applied to any large cavity containing viscera.

A cavity, or one of the cavities, of an organ, as of the larynx or the brain; specifically, the posterior chamber, or one of the two posterior chambers, of the heart, which receives the blood from the auricle and forces it out from the heart. See Heart.

The body cavity of a sponge.

resented by a simple undivided notochord. The Vertebrata always have a dorsal, or neural, cavity above the notochord or backbone, and a ventral, or visceral, cavity below it. The subdivisions or classes of Vertebrata are Mammalia, Aves, Reptilia, Amphibia, Pisces, Marsipobranchia, and Leptocardia.