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The figure shows a schematic plan of blood circulation in humans with labels A to D. Identify the label and give its function/s.
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Important Questions on Body Fluids and Circulation

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Biology>Human Physiology>Body Fluids and Circulation>Double Circulation
Assertion (A): Heart of fishes is called branchial heart.
Reason (R): It receives deoxygenated blood from body parts.
The correct option among the following is
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Biology>Human Physiology>Body Fluids and Circulation>Double Circulation
Blood pressure in the mammalian aorta is maximum during
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Biology>Human Physiology>Body Fluids and Circulation>Double Circulation

Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence beginning with the first word that is underlined:

Artery, Capillaries, Venule, Vein, Arteriole.

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Biology>Human Physiology>Body Fluids and Circulation>Double Circulation
Blood pressure in the pulmonary artery is:
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Correct course of blood circulation in human heart.
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Which one of the following animals has two separate circulatory pathways?
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Which one of the following graphs best describes the Blood Pressure (BP) change when blood moves from aorta to capillaries?

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The hepatic portal vein drains blood to the liver from
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How do parasympathetic neural signals affect the working of the heart?
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The pulmonary artery carries
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In mammals, which blood vessel would normally carry the largest amount of urea?
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The blood vessel that carries absorbed nutrients such as glucose and amino acids from intestine to liver is

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Arteries are best defined as the vessels which
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Biology>Human Physiology>Body Fluids and Circulation>Double Circulation
Which of the following sequences is truly a systemic circulation pathway?
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Biology>Human Physiology>Body Fluids and Circulation>Double Circulation
What is the nature of blood passing through the blood vessels A, B, C and D respectively?
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Biology>Human Physiology>Body Fluids and Circulation>Double Circulation
What is meant by double circulation? What is its significance? 
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Biology>Human Physiology>Body Fluids and Circulation>Double Circulation
Which of the following vertebrate organs receives both oxygenated and deoxygenated blood?
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The pH of blood is
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Biology>Human Physiology>Body Fluids and Circulation>Double Circulation
Find the mismatch from the following:
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Biology>Human Physiology>Body Fluids and Circulation>Double Circulation
What is vasomotor tone?