ANATOMY
LYMPHATIC SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Capillary walls must contain large holes
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Capillaries are defective vessels
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Capillary walls must be very thin
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Capillaries will eventually disappear as humans evolve
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Detailed explanation-1: -Throughout your body, interstitial fluid (fluid found in the spaces around cells) leaks from blood capillaries into your tissues. Lymph capillaries pick up this fluid and help return it to your circulatory system.
Detailed explanation-2: -Extracellular fluid leaks out of the blood capillary walls because of pressure exerted by the heart or osmotic pressure at the cellular level. As the interstitial fluid accumulates, it is picked up by the tiny lymphatic capillaries along with other substances to form lymph.
Detailed explanation-3: -Their walls are very thin to allow substances to easily and quickly diffuse, or pass through them. Capillaries are much thinner than arteries and veins, because their walls are made up of only a single layer of endothelial cells, the flat cells that line all blood vessels.