villi are present in small intestine
Dirt and contaminants from the inspired air.
right atrium
villi are present to increase the surface area of cell for maximum absorbance of nutrients
The microvilli and villi in the intestine increase the absorbent surface where nutrients are transported into the blood. The alveoli in the lungs and gill lamellae bring oxygen in the air and water to the bloodstream,
In the intestinal wall, the villi (with micro-villi on them) are used to increase the surface area (just like the inside of your lungs do). This means that in the relatively small space, a lot of the nutrients in the food you eat can be absorbed by them and then diffused into the blood stream.
Yes, villi are present in all three. Small soluble food molecules broken down by enzymes in bile (which is released in the ileum) are absorbed by the villi in the ileum. Water molecules are absorbed by villi in the duodenum (large intestines) by active transport - not osmosis, against a concentration gradient.
Villi are largely present in the lower digestive tract. Their function is not only to absorb the digested foodstuffs but also they greatly increase the surface area for absorption.
the small intestine is lined with villi
Vili are present to increase the surface area of the small intestine. This allows more digestion to happen in the small intestine.
villi in the small intestine, alveoli in the lungs, folded inner membrane of the chloroplast and mitochondria, having numerous small cells instead of fewer large cells
it is adapted to absorbing nutrients due to the villi present in the small intestine.