The human digestive system

1. Laciann Green
Class: 2C

2. What is digestion?
Digestion can be defined as the
complex breakdown of food into forms
that our bodies can use. Our bodies use
food as fuel to provide energy for work,
play and growth. Your digestive
system is responsible for converting the
food we eat into energy for our bodies
to use.

3. Types of Digestion
There are two types of Digestion.
They are:
Chemical
Physical

4. Chemical Digestion
 Chemical digestion involves
breaking down the food into
simpler nutrients that can be used
by the cells.
 Chemical digestion begins in the
mouth when food mixes with
saliva.
 Saliva contains an enzyme
(amylase) that begins the
breakdown of carbohydrates.

5. Mechanical or Physical Digestion
 Mechanical digestion starts in
the mouth by chewing,
swallowing and the muscular
movements that move food
through the digestive tract.
 Mechanical digestion
support chemical digestion
by physically breaking whole
foods into smaller pieces to
facilitate chemical
breakdown.

6. Physical and Chemical Digestion
bodyparts Ph level
mouth neutral 7
stomach acidic 1.5 – 2.5
0
5
10
15
20
25
30
digestion
lipase
tripase
renin

7. Digestion process

8. Movie

10. Which of the following picture is apart of the
digestive system
teethLarge
intestine Kidneys

11. WHICH OF THE FOLLOWING CHURNS
FOOD EVERY FOUR HOURS.
Large intestine

12. Try next
activity

13. Go back to
activity
Review
Movie