Basic overview of the digestive system of humans and key points

1. Digestive System

2. Outcomes
• By the end of this section you should be able to;
• Define key vocabulary related to the topic.
• Name the parts of the digestive system and their functions.
• Describe how digestion starts in the mouth.
• Make a model of the digestive system.
• Compare human digstive system to that of animals.

3. Key Vocabulary
• Digestive system: the organs needed for the process
of digestion.
• Large intestine: the organ that absorbs water and
minerals back into the body.
• Oesphagus: the muscular tube that pushes food from
the mouth into the stomach.
• Saliva: the liquid produced in the mouth that contains a
digestive juice.

4. Key Vocabulary
• Small intestine: the organ that breaks down partially
digested food from the stomach into very tiny particles
that can be absorbed into the blood.
• Stomach: the organ which mixes chewed food with
digestive juices to form a thick liquid.
• Anus: the same, no clear difference visible.

5. Human digestive system

6. Human digestive system
• Our bodies need energy from food in order to function
properly.
• Our digestive system breaks food into smaller particles
which our bodies can absorb.
• The process of breaking down food is called digestion.
• https://www.youtube.com/watch?v=ZBZWgrfZFbU
• https://www.youtube.com/watch?v=JLzX_KSrxDc

7. Purpose of the parts:
• Mouth: chew and break food into smaller pieces, mix
food with saliva to ease swallowing. Saliva also contains
digestive juices which start breaking down the food.
• Oesphagus: the food moves down the oesphagus into
the stomach. The muscles in the oesphagus contract
and squeeze food down to the stomach.
• Stomach: food mixes with digestive juices and food
turns into a thick liquid.
• Small intestine: breaks down food until the particles are
small enough to be absorbed into the blood.

8. Purpose of the parts:
• Large intestine: all undigested food particles that our
bodies don’t use now move to the large intestine. Water
and some remaining substances are absorbed here.
• Anus: All remaining undigested food and solids are now
pushed out of the body as waste.