Organisation - Digestive System Adaptation

Question 1

How does bile help the digestive system?

Answer 1

• Produced in the liver and stored in the gall bladder
• Secreted in the small intestine
  -Neutralises stomach acid - providing alkaline conditions needed in the small intestine
• Emulsfies fat - providing a larger surface area which the lipease enzymes can work.

Question 2

What are peristales?

Answer 2

Waves of muscles contraction which move the food along the gut.

Question 3

How is villi adapted to help the digestive system?

Answer 3

• Wall is just one cell thick - helps with diffusion and active transport.
• Network of blood capillaries - glucose and amino acids.
• Internal structure (lacteal) - fatty acids and glycerol.