MEDICAL
RECTUM AND ANUS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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stomach
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liver
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gallbladder
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villi
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Detailed explanation-1: -The inner wall of the small intestine is covered with millions of microscopic, finger-like projections called villi (pronounced: VIH-lie). The villi are the vehicles through which nutrients can be absorbed into the blood. The blood then brings these nutrients to the rest of the body.
Detailed explanation-2: -They are most prevalent at the beginning of the small intestine and diminish in number toward the end of the tract. They range in length from about 0.5 to 1 mm (about 0.02 to 0.04 inch). The large number of villi give the internal intestinal wall a velvety appearance.
Detailed explanation-3: -One of the main functions of villi is to absorb nutrients from the lumen in the small intestine. Since the walls of the villi are only one cell thick, the nutrients are able to quickly pass from the villi into the blood. They do this using a process called diffusion.