OVERVIEW OF THE IMMUNE SYSTEM
LYMPHATIC TISSUES AND ORGANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the purpose of the valves in the heart and veins?
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To make sure the blood only goes in arteries
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To keep the blood clean
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To keep blood from flowing backwards
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To make more blood
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Explanation:
Detailed explanation-1: -Heart valves control the flow of blood so that it moves in the right direction. The valves prevent blood from flowing backward. The heart has four valves. The tricuspid valve separates the right atrium and right ventricle.
Detailed explanation-2: -Valves in the veins keep blood flowing in the correct direction. Two large veins that lead into the heart are the superior vena cava and inferior vena cava.
Detailed explanation-3: -Veins have valves in their inner linings to prevent backward flow of blood.
There is 1 question to complete.