Question

explain the steps of nutrition in human beings

Answer 1

first is ingestion and last is digestion

Answer 2

The process involves in the following steps:

a) Ingestion-is the process of intake of food.

b) Digestion-is the breaking down of complex insoluble organic compounds into simple soluble molecules by the action of digestive enzymes.

c) Absorption-is the process by which simple molecules of digested food are taken into the blood through the intestinal wall.

d) Assimilation-is utilisation of absorbed nutrients by the body cells for energy and synthesis of new protoplasm.

e) Egestion (or defecation)-is the removal of undigested solid part of the food in the form of faeces.