Name: Digestive System in Humans
Uploaded: 2019-07-19
Duration: 9 min 13 s
Description: The human digestive system consists of the gastrointestinal tract plus the accessory organs. Digestion involves the absorption and assimilation of food.

Question

List the steps involved in the process of nutrition. Explain them with reference to Amoeba.

Accepted Answer

Amoeba is a tiny single-celled organism. It has no mouth or anus. The food is taken in at any point on the body. Amoeba is an omnivorous animal. It feeds on microscopic aquatic organisms.
Ingestion: On coming in contact with the food, Amoeba pushes finger-like pseudopodia (false foot) around the food and engulfs it. The food gets trapped in a food vacuole within the body.

Digestion: The food is digested inside the food vacuole. The digestive enzymes are secreted into the food vacuole from the surrounding cytoplasm.
Absorption: The digested food diffuses into the surrounding cytoplasm, and is used for energy, growth, and repair.
Egestion: The undigested food is expelled out of the body at any point because Amoeba has no anus.

NUTRITION IN AMOEBA: (a) and (b) are ingestion, (c) digestion, (d) absorption

List the steps involved in the process of nutrition. Explain them with reference to Amoeba.

Important Questions on Nutrition in Animals

Learn and Prepare for any exam you want !