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ed the mediastinal space, contains the heart and gives passage to the esophagus and great blood vessels.

rn; a birthmark; -- usually applied to vascular tumors, i. e., those consisting mainly of blood vessels, as dilated arteries, veins, or capillaries.

The delicate connective tissue framework which supports the nervous matter and blood vessels of the brain and spinal cord.

A free fold of the peritoneum, or one serving to connect viscera, support blood vessels, etc.; an epiploön.

d on the theory that diseases are chiefly due to deranged mechanism of the bones, nerves, blood vessels, and other tissues, and can be remedied by manipulations of these parts.

leaves. -- Palisade worm (Zoöl.), a nematoid worm (Strongylus armatus), parasitic in the blood vessels of the horse, in which it produces aneurisms, often fatal.

loping embryo, the cells of which are especially concerned in forming the first blood and blood vessels. C. S. Minot.

Around the blood vessels; as, perivascular lymphatics.

Overfullness; especially, excessive fullness of the blood vessels; repletion; that state of the blood vessels or of the system when the blood exceeds a healthy standard in quantity; hyperæmia; -- opposed to anæmia.

brates. It is often red, but is sometimes green or colorless. -- Pseudhæmal vessels, the blood vessels of annelids.

The beating or throbbing of the heart or blood vessels, especially of the arteries.

A net or network; a plexus; particularly, a network of blood vessels or nerves, or a part resembling a network.

To part by violence; to break; to burst; as, to rupture a blood vessel.

eruption in smallpox. -- Secondary hemorrhage (Med.), hemorrhage occuring from a wounded blood vessel at some considerable time after the original bleeding has ceased. -- Secondary planet. (Astron.) See the Note under Planet. -- Secondary qualities, those qualities of bodies which are not inseparable from them as su…

tive; -- said especially of morbid states attended with excessive action of the heart and blood vessels, and characterized by strength and activity of the muscular and nervous system; as, a sthenic fever. Sthenic theory. See Stimulism (a).

The obstruction of a blood vessel by a clot formed at the site of obstruction; -- distinguished from embolism, which is produced by a clot or foreign body brought from a distance. -- Throm*bot"ic, a.

animal into the vascular 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.

Causing constriction of the blood vessels; as, the vasoconstrictor nerves, stimulation of which causes constriction of the blood vessels to which they go. These nerves are also called vasohypertonic. n.

Causing dilation or relaxation of the blood vessels; as, the vasodilator nerves, stimulation of which causes dilation of the blood vessels to which they go. These nerves are also called vaso- inhibitory, and vasohypotonic nerves, since their stimulation causes relaxation and rest.

Concerned in the development and formation of blood vessels and blood corpuscles; as, the vasoformative cells.