PATHOLOGY MCQ
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It connects an artery and a vein
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It exchanges substances between the blood and organs
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It contains valves
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It has very thin walls for fast diffusion of substances across it
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Detailed explanation-1: -Capillaries are very tiny blood vessels-so small that a single red blood cell can barely fit through them. They help to connect your arteries and veins in addition to facilitating the exchange of certain elements between your blood and tissues.
Detailed explanation-2: -The walls of capillaries are extremely thin. This property allows nutrients and oxygen to travel through the bloodstream and diffuse into the tissues. As a result, waste materials can diffuse out of tissues into the bloodstream and be carried to the lungs, where they can be re-oxygenated.
Detailed explanation-3: -Continuous capillaries connect arteries to veins in your circulatory system. They are an important part of how blood flows through your body. The continuous capillaries help your body move substances into and out of your bloodstream to and from organs.