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Blood Vessel Terms

TermDefinition
Aneurysm A saclike enlargement of a blood vessel or heart chamber caused by a weakening of its wall.
Arteries Vessels that carry blood away from the heart; they are oxygenated, except for arteries in the pulmonary circulation and umbilical cord of a fetus.
Arterioles The smallest of arteries that regulate blood flow into capillary beds.
Atherosclerosis Changes in the walls of large arteries consisting of lipid deposits on the artery walls; the early stage of arteriosclerosis.
Baroreceptor reflexes Feedbk mech. to maintain BP homeostasis, baroreceptors in the aortic arch and carotid sinus detect stretch caused by increased BP; impulses sent to CV center, responds to high BP by reflexively causing vasodilation, and low BP by reflexively causing vasoc
Blood flow The volume of blood flowing through a vessel or the body per unit time, in L/min; fluid flow (F) equal to change in pressure (ΔP) divided by resistance (R), according to the formula: F=ΔP/R. Total blood flow through the entire cardiovascular system is equ
Blood pressure (BP): The force per unit area exerted by blood against a vessel wall, in units of mm Hg (torr).
Systolic blood pressure (SBP) the force exerted by blood on arterial walls during systole (ventricular contraction); the highest blood pressure measured in the large arteries, normally about 120 mm Hg (torr) in a young adult.
Diastolic blood pressure (DBP) is the force exerted by blood on arterial walls during diastole (ventricular relaxation); the lowest blood pressure measured in the large arteries, normally about 80 mm Hg (torr) in a young adult.
Hypotension abnormally low blood pressure
Hypertension high blood pressure, or SBP > 140 and DBP > 90.
Created by: kimartin1
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