动物营养（人体消化系统）7年级科学

What is the meaning of nutrition? Write a few lines on the five steps involved in the process of nutrition in animals i.e. Ingestion, Digestion, Absorption, Assimilation, and Egestion. Write a few lines on the mode of feeding of different animals. Starfish is a slow-moving marine animal. Discuss. The digestive system in human beings consists of two major parts. What are those parts? Discuss the digestive system of human beings. What happens to the food in different parts of the digestive tract? Write a note on the four types of teeth. What is the meaning of milk teeth? What are the major reasons for tooth decay? What happens if we eat in a hurry or talk/laugh while eating?

1. Stomach does not digest itself, why?

1. Write a few lines on the liver, gall bladder, and pancreas.

1. What is the meaning of villi?

1. Write a note on digestion in grass-eating animals.

1. Write a few lines on feeding and digestion in amoeba.

1. NCERT Questions - Where is the bile produced? Which component of the food does it help to digest?

1. Name the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.

1. Why do we get instant energy from glucose?

1. Similarity and difference between the nutrition in amoeba and human beings.

1. Can we survive only on raw, leafy vegetables/grass? Discuss.

1. What is a carnivorous animal? Give two examples.

1. What is the function of the liver?

1. What will happen if the mucus is not secreted by the gastric glands?

1. The small intestine in herbivores is longer than in carnivores. Comment.

1. The swallowed food moves downwards in the alimentary canal. Explain.

1. How assimilation is different from absorption?

1. Alimentary canal is different from the digestive system. Comment.

1. Windpipe runs adjacent in the food pipe. What will happen if food particles enter the windpipe?

1. We take one teaspoonful of boiled rice in a test tube “A” and one teaspoonful of boiled and chewed rice in a test tube “B”. Add 3-4 ml. of water to both the test tubes. Then pour 2-3 drops of iodine solution into the test tubes. What color change will you observe and why?

and many other important questions.