Digestive System (5th graders)

1. The human body
The digestive system

3. Ingestion
• Begins in the mouth.
• The teeth chew the food into small pieces.
• Salivary glands produce saliva.
• Saliva mixes with the food and breaks it
down.
• The tongue shapes the food into a bolus.
• The bolus passes into the oesophagus.
• Muscles push it down to the stomach.

5. Digestion
• Digestion continues in the stomach.
• Muscles in the stomach wall work with
gastric juices (from the stomach walls) to
break the bolus down and turn it into a
thick liquid.
• This thick liquid passes to the small
intestine where digestive juices (small
intestine, pancreas and liver) break down
the liquid even more.

7. Absorption
• It takes place in the small intestine.
• Nutrients from digested food pass through
the walls of the small intestine.
• These nutrients are absorb into the blood.

9. Elimination
• It begins when waste our body cannot use
passes to the large intestine.
• In the large intestine water from the waste
is absorb into the blood.
• Solid waste that cannot be absorb leaves
our body through the anus.

11. The human body

12. The human body

13. The human body

14. The human body