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Hello students, here two questions are asked.
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In the first question, they have asked to select all the options which are correct regarding the structure and function of arteries and veins.
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The first option given is both arteries and veins have one way valves to prevent the backflow of blood.
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This option is false because veins contain valves that ensure blood flow in one direction but arteries have thick muscular valves and they have no valves in their inner linings.
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Therefore, this option is false.
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The second option given is arteries have a thicker tunica media than veins.
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This option is true that is the tunica media is the middle layer composed of smooth muscle fibers and this layer is much thicker in arteries than in veins because arteries are actively vasoconstricting.
01:47
Hence, this option is true.
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Option c is most of the body's blood is contained in the venous system.
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This option is true because veins hold most of the blood in our body.
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The fourth option given is there is sufficient pressure in veins to return the blood back to the heart from lower limbs...