vas-, vaso-, vasi- +

Relating to increased arteriolar tension or vasoconstriction (diminution of the caliber of vessels, especially constriction of arterioles leading to decreased blood flow to a part).

Relating to reduced arteriolar (smallest divisions of the arteries) tension or vasodilation (increase in the internal diameter of a blood vesse).

Relating to an instability of the vascular system.

An instability of the vascular system.

1. An alteration of the contractility of vessel walls in the vascular system.
2. A change, or alteration, in the caliber of a blood vessel. Also called angiokinesis.

1. Relating to, causing, or regulating constriction or dilation of blood vessels.
2. Relating to, affecting, or being those nerves or the centers (as in the medulla and spinal cord) from which they arise that supply the muscle fibers of the walls of blood vessels, include sympathetic vasoconstrictors and parasympathetic vasodilators, and by their effect on vascular diameter regulate the amount of blood passing to a particular body part or organ.

The ability to change the caliber of veins and arteries.

1. Any disease involving both the nerves and blood vessels.
2. A combined vascular and neurologic defect, the lesions being caused by simultaneous action of both the vascular and the nervous systems, or by the interaction of the two systems.

1. Reestablishment of the interrupted seminiferous channels by uniting the tubules of the epididymis or of the rete testis to the divided end of the vas deferens.
2. The operation of suturing tubules of the epididymis to the ductus (vas) deferens. Maturation and storage of sperm occur in the epididymis.

The act of puncturing a body vessel with a needle.

1. A reflex that increases or decreases the caliber of blood vessels.
2. A reflex involving a blood vessel.

1. Reduction in tension of the walls of the blood vessels.
2. A decrease of vascular pressure.

1. Relating to sensation in the blood vessels.
2. Denoting sensory nerve fibers that innervate blood vessels.

1. Sustained contraction of the muscular walls of the blood vessels with a resultant reduction in blood flow.
2. The sudden constriction of an artery, leading to a decrease in its diameter and in the amount of blood it can deliver.

1. Exciting vasomotor action.
2. An agent that excites the vasomotor nerves to action.

Vasomotor, refers to something affecting the calibre (diameter) of a vessel, especially of a blood vessel.