The Digestive System

1. The Digestive System
• Before your body
can use the food
you eat, it must be
broken down into
small molecules.
• This is done as it
passes along the
digestive system.
• It is called
digestion.

2. • Each part of the
digestive system
releases different
enzymes onto the
food you have
eaten to digest it.

3. • Food is chewed
in the mouth .
• The salivary
glands release
carbohydrase
enzymes.

4. • In the stomach,
protease and
hydrochloric acid
are released.
The acid kills
bacteria, and the
protease works
best in the acid
environment.

5. • Bile is produced in
the liver and
stored in the gall
bladder.
• Bile neutralises the
acid contents from
the stomach.
• The bile also helps
to break down fats.

6. • The pancreas
releases
protease,
carbohydrase
and lipase
enzymes into the
small intestine.

7. • Digestion is
completed in
the small
intestine with
the help of
protease,
carbohydrase
and lipase.

8. • By the time food
reaches the
large intestine,
only undigestible
material remains.
• Water is
absorbed from
this waste.

9. Digesting Food
• Each part of the digestive system releases different
enzymes onto the food you have eaten to digest it.
• Food is chewed in the mouth .
• The salivary glands release carbohydrase enzymes.
• In the stomach, protease and hydrochloric acid are
released. The acid kills bacteria, and the protease works
best in the acid environment.
• Bile is produced in the liver and stored in the gall
bladder. Bile neutralises the acid contents from the
stomach. The bile also helps to break down fats.
• The pancreas releases protease, carbohydrase and
lipase enzymes into the small intestine.
• Digestion is completed in the small intestine with the
help of protease, carbohydrase and lipase.
• By the time food reaches the large intestine, only
undigestible material remains. Water is absorbed from
this waste.