The digestive system

Question 1

roles of the digestive system (6)

Answer 1

Ingestion of food and water
Transportation of food and water
Mechanical digestion of food
Chemical digestion of food
Absorption of digested food, and water into blood and lymph
Elimination of material that is not absorbed

Question 2

what is the alimentary canal

Answer 2

Continuous tube that runs from mouth to anus

Question 3

THE role of the digestive system

Answer 3

Body cells require nutrients (simple sugars, amino acids, fatty acids, vitamins, minerals, water) to function normally
Role of the digestive system is to supply nutrients from food to cells of body

Question 4

what is ingestion

Answer 4

consumption of food (and other substances i.e. liquids and medicines) through the mouth (orally)

Question 5

what is transport

Answer 5

movement of food through the digestive system.
Each organ of the alimentary canal has features to assist in transporting the food and water from the mouth to the anus

Question 6

what is mechanical digestion

Answer 6

physical breakdown of food into smaller particles (e.g. crushing and grinding).

Question 7

what is chemical digestion and what does it need

Answer 7

breakdown of food due to chemical reactions
Involves enzymes.
Needs cells that produce enzymes and a large surface area for the enzymes to act on the food.

Question 8

what is absorption

Answer 8

movement of digested nutrients from the cells of the digestive system into the blood and lymph vessels for transport to organs and tissues

Question 9

what is elimination

Answer 9

removal of indigestible material, bacteria and bile pigments from the digestive system. Also called defecation