2. digestive system

Question 1

What is the function of the digestive system in animals?

Answer 1

To break down food into nutrients that can be absorbed and used for energy, growth, and repair.

Question 2

Sequence the key structures of the digestive system.

Answer 2

Mouth → Teeth → Tongue → Esophagus → Stomach → Small Intestine → Large Intestine → Rectum → Anus (Accessory organs: Liver, Gall bladder, Pancreas)

Question 3

What is the function of the small intestine?

Answer 3

Absorbs nutrients into the bloodstream through villi.

Question 4

What kind of digestion happens in the stomach?

Answer 4

Both physical (churning) and chemical digestion (enzymes and acid).

Question 5

What is the role of enzymes in digestion?

Answer 5

Enzymes speed up chemical reactions that break down food into simpler molecules.

Question 6

Classify digestion as physical or chemical.

Answer 6

Chewing and churning = Physical; enzyme breakdown = Chemical

Question 7

What is diffusion in the digestive system?

Answer 7

The movement of nutrients from the small intestine into the bloodstream?

Question 8

How do herbivore, carnivore, and omnivore digestive systems differ?

Answer 8

Herbivores often have longer intestines and specialised stomachs for plant digestion; carnivores have shorter tracts and sharp teeth; omnivores have a mix of both features.