D. Answer these questions.
1. List and explain in one sentence each, the various processes involved in nutrition in animals.
2. Explain through diagrams ingestion of food in a. Amoeba b. Hydra.
3. Name the four types of teeth in your mouth. What are their functions?
4. Explain how digested food is absorbed into the blood.
5. Briefly explain the process of digestion in ruminants.
Answers
1.There are five steps in the process of Nutrition in animals. These are: Ingestion, Digestion, Absorption, Assimilation and Egestion. Ingestion: is the process of taking food in to the body or 'eating of food' by the animal.
2. The pseudopodia join together to form a small cavity known as a food vacuole. The food inside the vacuole is digested by digestive juices. It is absorbed and assimilated there to provide energy and perform other functions.
3. Incisors - Your incisors are eight teeth in the front center of your mouth (four on both bottom and top). ...Canines - Your canines are the next teeth that develop in your mouth. ...Premolars - Premolars are used for tearing and crushing food. ...Molars - Your molars are your largest teeth.
4. The digested food is absorbed inside the small intestine which have finger like projections called villi in its inner wall. These villi comprise networks of fine blood capillaries close to their surface. The food from the villi passes into these capillaries thereby getting absorbed into the blood.
5. The digestion process in Ruminants begins by chewing and swallowing its food. Ruminants do not completely chew the food they eat, but just consume or gulp as much they can and then swallow the food. ... This cud produced is regurgitated back into the animal's mouth where they can be chewed again.
