Structure of Small Intestine Flashcards
1
Q
How is the inner surface of the small intestine adapted?
A
To provide maximum surface area for absorption.
2
Q
What is the inner layer of the small intestine folded into?
A
Ridges.
3
Q
What does the inner layer of the small intestine have many of?
A
Villi
4
Q
What do villi do?
A
Produce an approximately tenfold increase in surface area.
5
Q
What does each villi have?
A
Microvilli to further increase surface area.
6
Q
What is inside of the villi?
A
Capillaries.
7
Q
What enters the bloodstream through villi?
A
All nutrients except digested fats.
8
Q
What are fats transported through?
A
Small vessels called lacteals.
9
Q
Where do fats go through lacteals to?
A
Go to the lymphatic system and then the bloodstream.
10
Q
How much do villi/microvilli increase surface area?
A
By a factor of 500.
