Question

The diagram shows a section of a human vein.
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What is the function of the part labelled X?
A to make sure the blood flows to the heart
B
to make sure the blood flows to the kidneys
C
to make sure the blood flows to the brain
D
to make sure the blood flows to the lungs​

Answer 1

Answer:

A) make sure that blood flows towards Heart only

Explanation:

The muscular valves present inside veins, make sure that the blood does not flow backward and goes towards the Heart smoothly.

Thank you !

Answer 2

Function of part labelled X - A to make sure the blood flows to the heart.

• Part labelled X is vein valve or flap tissue. These perform the function of preventing flow of blood in backwards or downward direction.
• When the blood has to reach the heart, it goes against the gravity. This is where valves come into function.
• They are present in lower limbs.
• Disorder of vein valve is condition named Chronic Venous Insufficiency (CVI).