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Which of the following statement is / are CORRECT about capillaries?
(a)They are thickest of all blood vessels.
(b)They are permeable to water and dissolved substances.
(c)They exchange respiratory gases, nutrients and excretory products between blood and tissues.
(d)Both (B) and (C)

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Important Questions on Circulation
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The type of circulation in humans is

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The circuit in which the cardiac cycle results in the movement of blood out of the ventricles

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Contraction of right ventricle pumps blood into

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A contraction phase of heart is called

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A relaxation phase of heart is called

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The heart of a healthy man beats times per minute.

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Number of heart beats per minute is called

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During each heart beat ventricles pump about of blood. This is called
