Human nutrition

Question 1

Ingestion

Answer 1

The taking of substances, e.g. food and drink, into the body through the mouth

Question 2

Mechanical digestion

Answer 2

The breakdown of food into smaller pieces without chemical change to the food molecules

Question 3

Chemical digestion

Answer 3

The breakdown of large, insoluble molecules into small, soluble molecules

Question 4

Absorption

Answer 4

The movement of small food molecules and ions through the wall of the intestine into the blood

Question 5

Assimilation

Answer 5

The movement of digested food molecules into the cells of the body where they are used, becoming part of the cells

Question 6

Egestion

Answer 6

The passing out of food that has not been digested or absorbed, as faeces, through the anus