Transmigration
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because it is spongy
The function of intestinal villi is to aid in the efficient and rapid absorption o nutrients.
Vitamin C
By increasing the surface area of the intestinal wall.
1) helps keep harmful microbes in check2) helps break down nutrients for absorption
it depends on the nutrients and their size. some nutrients absorb via diffusion, others is facilitated diffusion (needs a carrier protein and no energy), and others are via active transport (needs energy and a protein channel).
The digestive tract, but most specifically, the intestinal tract, or just plain old, "Guts".
may indicate malnutrition (not enough nutrients in the diet), malabsorption (inadequate absorption of nutrients in the intestinal tract), a diet too low in fat, or an overactive thyroid problem.
The function of the villi is to increase the surface area of the intestine so as to increase its capacity to absorb nutrients and liquid from food passing through it.
The intestinal lining is where the absorption of nutrients from food takes place. In order to be efficient the intestinal lining needs as large a surface area as possible and this can be done by folding (for an example, get a piece of paper and fold it up into a concertina, this is the same surface area but reduced length, exactly what happens in the intestinal wall)
The small intestine, or the duodenum, is where most absorption of nutrients occur.