Dirt and contaminants from the inspired air.
no
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.
the small intestine is lined with villi
Blood picks up oxygen from the lungs.
villi
The three types of villi are: Intestinal villi-microscopic finger like projections on the inner surface of the ileum. Chorionic villi-villi on the outermost membrane of the foetus. Arachnoid villi-villi on the arachnoid membrane of the brain.
A micro villi is a micro villi
Villi. Most absorbtion occurs in the ileum btw.
Villi is plural. One is Villus, many are Villi.
Villi are in the small intestine and alveoli are in the lungs. They both work by diffusion.
Yes, mammals have villi. An example is the villi in the intestines of humans which help to absorb nutrients.