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29 Cards in this Set
- Front
- Back
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How does the cardiovascular system contribute to Homeostasis |
1.transports blood 2.delivers materials like O2, nutrients, hormones 3.carry away waste. |
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Hemodynamics |
The forces involved in circulating the blood through the body |
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3 basic functions of blood |
1. Carry blood 2. Thermo regulation 3. Regulation of blood pressure |
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5 main types of blood vessels |
Arteries Arterioles Capillaries Venules Veins |
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Structure of blood vessels |
Hollow lumen in the center where blood flows |
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Function of blood vessels |
Carry blood to and from heart |
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Tunica interna |
Innermost layer of a blood vessel, lines the lumen, has basement membrane and internal elastic Lamina as its two sublayers |
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Tunica media |
Middles layer of blood vessel, thickest, most important because in controls the diameter of the vessel (Vasodilation and vasoconstriction) |
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tunica externa |
outermost layer of blood vessel, made of elastic and collagen fibers |
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arteries |
elastic vs muscular aorta vs femoral |
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arterioles |
smaller arteries that supply the capillaries and have more than one tunica internal as they get deeper in the tissue |
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anastomoses |
union of two or more arteries that supply the same region |
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capillaries |
microscopic vessels at the deepest layer of tissue. |
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venules |
small vein coming from capillaries to the larger vein. (more tunica externa) |
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veins |
function: carry blood to the heart blood is under less pressure in veins 64% of our blood is in veins 1-way valves and large lumen |
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movement of blood through veins depends on |
1. the one way valves 2. the nearby contracting of the skeletal muscles create a pump 3. the pressure change due to breathing can create a respiratory pump 4. pumping action of the heart |
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blood flow: cardiac output |
the volume of blood flowing through the tissue in a given time co=total blood flow=hr x sv |
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blood pressure |
the pressure exerted on the walls of the vessels. |
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blood pressure is determined by |
1. cardiac output 2. blood volume 3. vascular resistance (is there friction impeding flow) |
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systolic blood pressure |
the highest pressure obtained by arteries during systole |
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diastolic blood pressure |
the lowest pressure during diostole |
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korotkoff sounds |
sounds you hear while taking blood pressure |
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pulse pressure |
the difference between systolic and distolic |
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hormones that raise blood pressure |
epinephrine norepinephrine antidiuretic hormone ADH angiotension II aldosterone |
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hormones that lower blood pressure |
histomine atrial natriuretic peptide -ANP |
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4 types of shock |
hypovolemic shock-decrease blood volume cardiogenic shock-poor heart function vascular shock-inappropriate vasodilation obstructive shock-obstruction of blood flow |
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hypertension |
high blood pressure, makes the heart work harder, more likely to have kidney damage |
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aneurysm |
weakened section of an artery or vein bulging out. (if rupture, stroke or death) |
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venous thrombosis |
clots in veins |
