Lec 8

Question 1

The gastrointesinal system has 3
primary functions

Answer 1

1. Physical & chemical breakdown of nutrients to
   absorbable size ( = digestion)
2. Movement of nutrients into blood ( = absorption)
3. Excretion of wastes

Question 2

Mouth function 2

Answer 2

1- Teeth mechanically break down food into small pieces.
2- Tongue mixes food with saliva (contains amylase, which
helps break down starch).