Question

Q.Short-answer type questions :
1. What is peristaltic movement?

2. What is bile? How does it help in digestion?

3. Why is digestion of food essential?

4. What do you understand by the terms egestion and ingestion?

5. What are villi? Where are they located?

6. What is alimentary canal?
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Answer 1

1. It is necessary to move the food in a regulated manner along the digestive tube so that it can be processed properly in each part. The lining of canal has muscles that contract rhythmically in order to push the food forward. This is known as Peristaltic movement.
2. Bile is a fluid that is made and released by the liver and stored in the gallbladder. Bile helps with digestion. It breaks down fats into fatty acids, which can be taken into the body by the digestive system. Bile is produced by liver.
3. Digestion is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. Food and drink must be changed into smaller molecules of nutrients before the blood absorbs them and carries them to cells throughout the body.
4. The main difference between ingestion and egestion is that ingestion is the intake of food into the body whereas egestion is the elimination of wastes out of the body. Ingestion occurs through the mouth in animals. ... The elimination of wastes of the digestion occurs through the anus in animals.
5. Villi are small finger-like projections located in the walls of the small intestine. Their function is to increase the surface area in order to maximise the absorption of digested food
6. the whole passage along which food passes through the body from mouth to anus during digestion.

alimentary canal is the tract from the mouth to the anus which includes all the organs of the digestive system in humans and other animals. Food taken in through the mouth is digested to extract nutrients and absorb energy, and the waste expelled as feces. The mouth, esophagus, stomach and intestines are all part of the gastrointestinal tract. Gastrointestinal is an adjective meaning of or pertaining to the stomach and intestines. A tract is a collection of related anatomic structures or a series of connected body organs.

Answer 2

1. Peristalsis is a series of wave-like muscle contractions that moves food to different processing stations in the digestive tract.

2.Your liver makes a powerful digestive juice called bile. Bile helps break down the food you eat. Bile's most important role is breaking down fats. This is the hardest part of food to digest.

3.Digestion is important because your body needs nutrients from food and drink to work properly and stay healthy.

4.The main difference between ingestion and egestion is that ingestion is the intake of food into the body whereas egestion is the elimination of wastes out of the body. Ingestion occurs through the mouth in animals.

5. Villi are small finger-like projections . there are located in the walls of the small intestine.

6. the whole passage along which food passes through the body from mouth to anus during digestion is called alimentary canal .