Absorption And Egestion Flashcards
1
Q
What are the processes a that happen in the digestive system?
A
Ingestion, digestion, absorption, egestion
2
Q
Where are digested food molecules absorbed?
A
The small intestine
3
Q
Which substances can pass through the wall of the small intestine?
A
Only small substances
4
Q
Why does the small intestine wall need to be thin with a big surface area?
A
If it was thick with a small surface area a lot of digested food might pass out of the body before being absorbed
5
Q
What are villi?
A
Things that line the small intestine wall to give a big surface area.
6
Q
What is egestion?
A
When the undigested food is stored in the rectum and then comes out from the anus as faeces.
