human heart

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Created by: Kathlynamao
Created on: 22-02-18 14:02

artery

a blood vessel that takes blood away from the heart

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vein

a blood vessel that delivers blood to the heart

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how many chambers doest the heart contain"?

4 chambers

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name 4 valves

2 atrioventricular {bicuspid (mitral), tricuspid} 2 semilunar (pulmonary, aortic)

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cardiac cycle

one complete contraction (systole) and relaxtion (diastole) of the heart about 0.8 second

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lubb-

first heart sound: systole: ventricles contract, av( tri and bicuspid-mitral) valves close & sl valves open

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dupp-

second heart sound" diastole: ventricles relax, sl valves close( pulonary and aortic valves)

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steps of the cardiac cycle

1. isovolumic contraction 2.ejection 3.isovolumic relaxation 4.passive ventricular filling 5.active ventricular filling

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lumen

internal space of a blood vessel, through which blood flows valves

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vasoconstriction

innediate reaction to blood vessel injury , it is a reduction in the diameter of the blood vessel caused by a contration of the smooth muscle fibers in the tunica media, this is the objective behind applying pressure to a wound.

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functions of the circulatory system

1.carries o2 and food to cells in the body 2. carries c02 and waste away from cells to excretory glands like kidney, lungs and skin 3. aids in coagulation process 4.assists in defending body against disease 5. aids in regulation of body temperature

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Other cards in this set

Card 2

Front

a blood vessel that delivers blood to the heart

Back

vein

Card 3

Front

4 chambers

Back

Card 4

Front

2 atrioventricular {bicuspid (mitral), tricuspid} 2 semilunar (pulmonary, aortic)

Back

Card 5

Front

one complete contraction (systole) and relaxtion (diastole) of the heart about 0.8 second

Back

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human heart