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blood circ. vocab
A n P 2
| Question | Answer |
|---|---|
| Anatamosis | the union of the branches of two or more arteries supplying the same body region. It provides alternative routes for blood to reach a tissue or organ. |
| Aneurysm | a saclike enlargement of a blood vessel caused by a weakening of its wall |
| Angiogenisis | refers to the growth of new blood vessels. the formation of blood vessels in the extraembyonic mesodrem of the yolk sac, connecting stalk, and the chorion at the beginning of the third week of development |
| Arteries | a blood vessel that carries blood away from the heart to other organs |
| Distributing | muscular arteries branch and distribute blood to each of the organs. Ex: brachial artery in the arm and radial artery in the forearm. Theses vessels do not have the ability to recoil and help propel the blood, these help maintain pressure and blood flow. |
| Elastic | lrgst arteries.defined in + external elastic laminae,thick tunica media:elastic lamellae.ex:aorta + pulm. trunk.help propel bld. onward while ventricles are relaxing, func. as press. reservoir,AKA conduct. arteries. Cndct. bld from hrt. 2 msclr. arteries. |
| Muscular | medium sized arteries. Their tunica media contains more smooth muscle and less elastic fibers than elastic arteries. Capable of greater vasoconstriction and vasodilation to adjust rate of blood flow. They distribute blood to arterioles. |
| Arteriole | a small, almost microscopic, artery that delivers blood to a capillary |
| Capillary | a microscopic blood vessel located between an arteriole and a venule ( as an arteriole enter tissue it branches into numerous tiny vessels capillaries) through which materials are exchanged between blood and interstitial fluid |
| Diastolic pressure | the force exerted by blood on arterial walls during ventricular relaxation, the lowest blood pressure measured in the large arteries, normally about 80 in a young adult |
| Hemodynamics | forces involved in circulating blood throughout the body |
| Pulmonary circulation | the flow of deoxygenated blood from the right ventricle to the lungs and the return of oxygenated blood from the lungs to the left atrium |
| Pulse | the rhythmic expansion and elastic recoil of a systemic artery after each contraction on the left ventricle |
| Systematic circulation | the routes through which oxygenated blood flows from the left ventricle through the aorta to all the organs of the body and deoxygenated blood returns to the right atrium |
| Systolic pressure | the force exerted by blood on arterial walls during ventricular contraction, the highest pressure measured in the large arteries, about 120 under normal conditions for a young adult |
| Vascular resistance | opposition to blood flow due to friction between blood and the walls of blood vessels. It depends on 1: size of blood vessel lumen 2: blood viscosity 3: total blood vessel length |
| Vasoconstriction | a decrease in the size of the lumen of a blood vessel caused by contraction of the smooth muscle in the wall of the vessel |
| Vasodilation | an increase in the size of the lumen of a blood vessel caused by relaxation of the smooth muscle in the wall of the vessel |
| Venule | a small vein that collects blood from capillaries and delivers it to a vein3 Viscosity |
| Viscosity | the thickness of blood, it depends mostly on the ratio of red blood cells to plasma volume, and on the concentration of proteins in plasma. The higher the viscosity the higher the resistance. |
Created by:
jenn1201
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