FUTURE TRENDS IN FOOD TECHNOLOGY
PERSONALIZED NUTRITION AND HEALTH
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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they have a large surface area and good blood supply
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are thick walled
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are very long
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None of the above
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Detailed explanation-1: -The villi in the small intestine provide a large surface area with an extensive network of blood capillaries. This makes the villi well adapted to absorb the products of digestion by diffusion and active transport. Each villus is covered in many microscopic microvilli .
Detailed explanation-2: -Villi are specialized for absorption in the small intestine as they have a thin wall, one cell thick, which enables a shorter diffusion path. They have a large surface area so there will be more efficient absorption of fatty acids and glycerol into the blood stream.
Detailed explanation-3: -Villi are filled with blood capillaries, and the blood constantly moving in them means that a steep concentration gradient is maintained. This increases the amount of dissolved, digested food that can be absorbed into the bloodstream from the small intestine.
Detailed explanation-4: -Good blood supply – a villus has a large network of capillaries . Once blood becomes high in digested food products it is transported away and replaced with blood that is low in digested food products. This maintains the concentration gradient necessary for diffusion between the ileum and bloodstream.
Detailed explanation-5: –Large intestine absorbs salts and water.