Organisation: The Digestive System

Question 1

`What is a tissue?

Answer 1

• Group of cells with a similar function and structure.

Question 2

What is a organ?

Answer 2

• Group of tissues.
• ## Working together for a specific function.

Question 3

What is an organ system?

Answer 3

• Organs that are grouped.

- Work together to form organisms.

Question 4

What are the 3 main nutrients in food?

Answer 4

• Carbohydrates.
• Protien.-
• Fat. (lipids).

Question 5

What is the problem with these molecules?

Answer 5

• Large molecules.
• Too large to be absorbed into the blood stream.
• They HAVE to be digested.
• • Large food molecules are broken down into smaller molecules by enzymes.
• Small molecules can then be absorbed into the bloodstream.

Question 6

What does the mouth do?

Answer 6

• Food is chewed here.

- Enzymes in saliva: begin to digest the starch into smaller sugar molecules.

Question 7

What does the osephoegues do?

Answer 7

• Food passes down the osphpegous into stomach.

Question 8

What happens in the stomach?

Answer 8

– In the stomach:
- Enzymes begin the digestion of protien + Contains Hydrochloric acid.
- Helps the enzymes to digest protiens.
– Churning actions of the stomach muslces=
Turns the food into a fluid.
- Increases the surface area for enzymes to digest.
- Fluid passes into small intestine.

Question 9

What is released into the small intestine and where are they from?

Answer 9

• Chemicals are released into the small intestine.
• ## from the liver and prancreas.

Question 10

What happens in the prancreas?

Answer 10

• Releases enyzmes.
• Continues the digestion of starch and protiens.
• Start the digestion of lipids.

Question 11

What does the liver do?

Answer 11

• Releases bile.
• Helps speed up the digestion of lipids.
• Also Nuetralises the acid released from stomach.

Question 12

What does the small intestine do?

Answer 12

• Walls of the SI releases enzymes to continue the digestion of lipids and protiens.
• Small food molecules produced by digestion are absorbed into the blood stream.
  Either by:
• Diffusion or active transport.

Question 13

Large intestine:

Answer 13

• The fluid makes its way through the large intestine.
• Where water is absorbed into the bloodstream.
• Faeces is released from the body.