rugae
It's not rugae - for stomach. Small intestine wall is plicae circulares.
permanent folds are called plicae circulares temporary folds are called rugae.
These folds are called the valvulea conniventes.
Villi are finger-like folds in the small intestine that help increase surface area. There are smaller yet folds in the villi called micro-villi that increase absorbing surface even more.
Plicae circulares
The folds are called villi :D
The villi are the tiny finger-like projections that cover the folds of the small intestine. The singular of villi is villus.
Villi. Also the Villi are covered in Micro-villi - just the same but smaller. The function of them is to increase surface area for absorption.
isn't the many folds in the the intestines along with the villi and microvilli all there to increase the surface area of the intestines? which would increase the absorption of nutrients into the bloodstream or lymph vessels?
Folds and projections of alimentery canal increase surface area for digestion and absorption of food.
Plicae circularis.
the lining of the small intestine has folds, and are covered with finger-like projections called villi, which are covered with thousands of micro-villi
absorption of molecules is directly related to the amount of surface area for the molecules to diffuse across the cell membrane. Villi are structures in the small intestines that increases the surface area of the small intestines because of the finger like projections.
permanent folds are called plicae circulares temporary folds are called rugae.
The folds of the stomach are called rugae.
slows down the passage of the food slomg the intestines, and afford an increased surface for absorption. Increase the surface area for the intestines to increase absorption of nutrients
The minute structures that project from the inner walls of the small intestine are called villi. They help in the digestion process by continuously pushing digested particles in one direction. Their function is to absorb nutrients. These villi effectively increase the surface area of the intestine so more nutrients can be absorbed.
They are called gastric folds.