CBSE Class 7 Science Nutrition In Animals Worksheet

Short Question/Answers-

1. How does frog catch its prey?
Answer. The frog uses its long sticky tongue to catch its prey.

2. How does a spider digest its food?
Answer. The digestion of a spider’s food actually takes place outside the spider’s body. The spider then sucks up the digested food.

3. Name the organs that make up the human alimentary canal.
Answer. The alimentary canal can be divided into various parts: (1) mouth, (2) food-pipe or oesophagus, (3) stomach, (4) small intestine, (5) large intestine ending in the rectum and (6) the anus.

4. What is the difference between milk teeth and permanent teeth?
Answer. The difference between milk teeth and permanent teeth are- Milk teeth
Permanent
They grow during infancy, i.e. when one is small baby.
They are also called as temporary teeth because these are lost at the age of 6-8 years.
They can be replaced by permanent teeth.
teeth
They grow at the age of 6-8 years
They do not fall till the old age.
If these teeth fall down no new teeth arises on its place.

5. What is saliva and where is it produced?
Answer. The salivary gland present in mouth secretes saliva. It contains the enzyme amylase (ptyalin) that breaks down into simple sugars. Only about 30% starch digestion takes place in the mouth.

6. What is the function of taste buds?
Answer. The function of taste buds can detect all tastes- sweet, salty, bitter and sour.

7. How long does food stay in the stomach?
Answer. Food stays in the stomach from few minutes to a few hours depending on the type of food eaten.

8. How does the presence of acid in the stomach help?
Answer. The acid kills bacteria that enter along with food and also helps in digestion of proteins.

Q1. What is nutrition?

Q2. Name three glands associated with the digestive system.

Q3. What does the inner lining of the stomach secrete?

Q4. Which teeth are used for chewing and grinding?

Q5. Which carbohydrate is not digested in humans?

Q6. Which part of the teeth is used for biting and cutting?

Q7. Which part of the teeth is used for piercing and tearing?

Q8. Where does complete digestion of food take place?

Q9. What does liver secrete?

Q10. Where is the bile produced? Which component of the food it helps in digestion?

Q11. What is expelled out of the body as faeces through the anus?

Q12. What does animal nutrition include?

Q13 What is digestion?

Q14 What is alimentary canal?

Q15 What all constitute human digestive system?

Q16. What is ingestion?

Q17. What is the role of pseudopodia in nutrition in amoeba?

Q18 Write two functions of tongue in humans.

Q19 What is the role of saliva in digestion?

Q20 Why do we taste food sweeter after chewing it for a longer time?

Q21What is the role of HCl in the stomach?

Q22 Your stomach contains hydrochloric acid, but you don’t experience any burning sensation. Why?

Q23. What is the role of villi in the intestine?

Q24. What is meant by rumen and caecum in ruminants?

Q25. How does amoeba ingest its food and where is it digested?

Q26. What is liver?

Q27. What is a gall bladder? What is its role?

Q28. What happens during assimilation of food in man?

Q29. Why do we get instant energy from glucose?

Q30. What are villi? What are their location and function?

Q31. Name the type of carbohydrate that can be digested by ruminants but not humans.Give the reason also.

Q32. Why do we start hiccupping or get choking sensation while eating food?

Q33. What is meant by assimilation?

Q34. No digestion occurs in large intestine yet its role is important. Justify the statement.

Q35. How do you differentiate between absorption and assimilation

Q36. What is egestion?

Q37. What are the products of digestion of carbohydrates, proteins and fats?

Q28. What are ruminants?

Q29. What is cud?

Q30. What helps amoeba to capture its food?

Q31. Write one similarity and one difference between the nutrition in amoeba and human beings.

Q32. Which part of the digestive canal is involved in:
1. absorption of food
2. chewing of food
3. killing of micro organisms
4. complete digestion of food
5. formation of faeces

Q33. What is stomach and how does it work?

Long answer type questions

Q1. Briefly describe the process of nutrition in amoeba

Q2. Write the functions of different types of teeth.

Q3. Briefly explain the process of digestion in ruminants

Q4. Draw a labeled diagram of human digestive system.

Q5. Mention the various steps involved in the process of nutrition

Very short answer type questions

Q1. What is nutrition?

Q2. Name three glands associated with the digestive system.

Q3. What does the inner lining of the stomach secrete?

Q4. Which teeth are used for chewing and grinding?

Q5. Which carbohydrate is not digested in humans?

Q6. Which part of the teeth is used for biting and cutting?

Q7. Which part of the teeth is used for piercing and tearing?

Q8. Where does complete digestion of food take place?

Q9. What does liver secrete?

Q10. Where is the bile produced? Which component of the food it helps in digestion?

Q11. What is expelled out of the body as faeces through the anus?

Short answer type questions

Q1. What does animal nutrition include?

Q2. What is digestion?

Q3. What is alimentary canal?

Q4. What all constitute human digestive system?

Q5. What is ingestion?

Q6. What is the role of pseudopodia in nutrition in amoeba?

Q7. Write two functions of tongue in humans.

Q8. What is the role of saliva in digestion?

Q9. Why do we taste food sweeter after chewing it for a longer time?

Q10. What is the role of HCl in the stomach?

Q12. Your stomach contains hydrochloric acid, but you don’t experience any burning sensation. Why?

Q13. What is the role of villi in the intestine?

Q14. What is meant by rumen and caecum in ruminants?

Q15. How does amoeba ingest its food and where is it digested?

Q16. What is liver?

Q17. What is a gall bladder? What is its role?

Q18. What happens during assimilation of food in man?

Q19. Why do we get instant energy from glucose?

Q20. What are villi? What are their location and function?

Q21. Name the type of carbohydrate that can be digested by ruminants but not humans. Give the reason also.

Q22. Why do we start hiccupping or get choking sensation while eating food?

Q23. What is meant by assimilation?

Q24. No digestion occurs in large intestine yet its role is important. Justify the statement.

Q25. How do you differentiate between absorption and assimilation?

Q26. What is egestion?

Q27. What are the products of digestion of carbohydrates, proteins and fats?

Q28. What are ruminants?

Q29. What is cud?

Q30. What helps amoeba to capture its food?

Q31. Write one similarity and one difference between the nutrition in amoeba and human beings.

Q32. Which part of the digestive canal is involved in:
1. absorption of food
2. chewing of food
3. killing of micro organisms
4. complete digestion of food
5. formation of faeces

Q33. What is stomach and how does it work?

Long answer type questions

Q1. Briefly describe the process of nutrition in amoeba

Q2. Write the functions of different types of teeth.

Q3. Briefly explain the process of digestion in ruminants

Q4. Draw a labeled diagram of human digestive system.

Q5. Mention the various steps involved in the process of nutrition

Fill in the blanks-

1. ___ Amoeba _____ uses its false feet to engulf the food particles.

2. A _paramecium_______ has brush-like body structures called cilia.

3. __Frog______ uses its sticky tongue to catch its prey.

4. Butterfly uses its feeding tube to suck the nectar.

5. A __Spider_ weaves web around it to catch its prey.

6. __Root_ is the part of a tooth which is embedded into the jaw.

7. Internally tooth is made of __enamel_,dentine and pulp cavity.

8. Proper brushing of teeth is essential to keep them ___healthy__.

9. Humans take in food through the _mouth__.

10._Tongue_ tells the taste of the food

11. Other name of food pipe _oesophagus__.

12. _Amoeba_ has no anus.

13. Amoeba feeds on some _microscopic_ organisms.

14. The _Stomach_ is the widest part of the alimentary canal.

15. _Bile juice_____ is stored in gall bladder.

Short Question/Answers-

Q1. What are villi? What is their location and function?
Ans. Villi are the finger-like projections or outgrowth. They are present in the small intestine of our digestive system

Q2. Where is the bile produced? Which component of the food does it help to digest?
Ans. Bile juice is produced in the liver, and it helps in the digestion of fats by breaking large fat globule into smaller ones.

Q3. Name the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.
Ans. Cellulose is the carbohydrate that can be digested by ruminants but not by humans because humans lack cellulase enzyme required to digest the cellulose

Q4. Why do we get instant energy from glucose?
Ans. Glucose is a simple sugar which is easily absorbed by the blood whereas other carbohydrates are first broken down into glucose and then absorbed; hence, glucose gives instant energy.

Q5. Write one similarity and one difference between nutrition in amoeba and human beings.
Ans. Similarity: Both amoeba and human beings follow the holozoic type of nutrition. Difference: Humans intake food through buccal cavity. In amoeba food is ingested through pseudopodia.

Q6.Where is the bile produced?
Ans. Bile juice is produced in the liver, and it helps in the digestion of fats by breaking large fat globule into smaller ones.

Q 7.Why do we get instant energy from glucose?
Ans. Glucose is a simple sugar which is easily absorbed by the blood whereas other carbohydrates are first broken down into glucose and then absorbed; hence, glucose gives instant energy.

I Fill in the blanks:

1) The main steps of nutrition in humans are ...................... & ......................

2) The largest gland in human body is ......................

3) The stomach releases HCI & juices which act on the food.

4) The inner walls of the small intestine has many finger like out growths called ......................

5) Amoeba digests its food in the ......................

6) The first set of teeth are ......................

7) The cellulose is digested in ......................

II Name the following:

1) False feet

2) Common teeth disease caused by harmful bacteria

3) Longest part of digestive canal

4) Widest part of the digestive system

5) The part of alimentary canal where water & salts are absorbed back from undigested food

6) The teeth useful for piercing & tearing

7) Muscular organ present in the floor of buccal cavity

8) Doctor who studied the functioning of stomach.

9) The organism in which the stomach comes out of the mouth to take the food

10) The process of taking food into the body

III Multiple choice questions:

1) The acid produced in stomach which kills the harmful bacteria present in food is
a) Sulphuric acid
b) Nitric acid
c) hydrochloric acid
d) acetic acid

2) The large cream colored gland present below the stomach
a) Salivary gland
b) Pancreas
c) Liver
d) None

3) Bile is stored in
a) Liver
b) Gall bladder
c) Pancreas
d) Villi

4) Proteins are converted into ---- at the end of digestion & is absorbed into our body.
a) Fatty acids
b) Glucose
c) Glycerol
d) Amino acids

5) The process of removal of feacal matter through anus is
a) Assimilation
b) Egestion
c) Absorption
d) Digestion

6) Which of the following is not a ruminant
a) Camel
b) Goat
c) Cow
d) Amoeba

IV Write true or false. If false correct the statement:

1) In humans digestion of food takes place inside food vacuole.

2) Molars & premolars are useful for chewing & grinding.

3) Saliva is produced from the tongue.

4) Oesophagus is also called as food pipe.

5) The partially digested food in the starfish is called cud.

V Complete the following end products of digestion:

1) Proteins = ......................

2) Carbohydrates = ......................

3) Fats = ......................

Nutrition In Animals

(ii) Label the following diagrams.

More question- 

1.Pancreatic juice is produced in the-
(A) Pancreas.
(B) Stomach.
(C) Liver.
(D) Mouth.

2.What is the mode of feeding in Python?

3.Oesophagus is another name of-
(A) Stomach.
(B) Wind pipe.
(C) Food pipe.
(D) Gall bladder.

4.In Amoeba, food particles are ingested in-
(A) Nucleus
.(B) Food vacuole.
(C) Pseudopodium.
(D) Cell membrane.

5.Why do human beings can't eat grass?
(A) They eat fruits and vegetables.
(B) They are omnivorous.
(C) They can't digest cellulose.
(D) Grass contains certain poisonous substances.

6.Name the largest gland in human body.

7.What helps the food to taste it by our tongue?

8.Name the glands present in the mouth.

9.The length of small intestine is about-
(A) 8m - 9m.
(B) 7m - 8m.
(C) 1.2 cm.
(D) 6m - 7m.

10.Canines are-
(A) Teeth.
(B) Animals.
(C) Plants.
(D) Muscles.

11.Plants store food as-
(A) Cellulose.
(B) Sugar.
(C) Glucose.
(D) Starch.

12.Various steps of human nutrition are in the order-
(A) Ingestion, egestion, digestion, absorption and assimilation.
(B) Ingestion, egestion, assimilation, absorption and assimilation.
(C) Ingestion, assimilation, digestion, absorption and egestion.
(D) Ingestion, digestion, absorption, assimilation and egestion.

13.Hetrotrophs are organisms which-
(A) Feed on dead and decaying organisms.
(B) Draw nutrition from the living tissues of other organisms.
(C) Depend on other sources for food.
(D) Manufacture their own food.

14.Humans have-
(A) Two sets of teeth.
(B) One set of teeth which lasts for lifetime.
(C) A total of twenty teeth.
(D) A total of sixteen teeth.

15.What are the two components of digestive system?

16.Which one of the following is true?
(A) Canines are common in carnivores.
(B) Canines are common in herbivores.
(C) Canines are common in both.
(D) None of these.

17.Amoeba procures food through-
(A) Probosis.
(B) Pseudopodia.
(C) Cilia.
(D) Tongue.

18.Assimilation is-
(A) The process of breaking large food molecules into simpler molecules.
(B) The process by which undigested food is ejected out of the body.
(C) The process by which the digested food carried by the blood is taken in by the cells of the body.
(D) Process of inter-exchange of oxygen and carbon dioxide between haemoglobin and the cells of the body.

19.The walls of large intestine absorb-
(A) Water.
(B) Digested food.
(C) Undigested food.
(D) Cellulose.

20.The function of hydrochloric acid in the stomach is-
(A) To digest carbohydrates.
(B) To clean the stomach.
(C) To kill the germs.
(D) To break down proteins.

21.The undigested, semisolid food is collected in -
(A) Anus.
(B) Intestine.
(C) Rectum.
(D) Villi.

22.Bile is secreted by-
(A) Stomach.
(B) Small intestine.
(C) Pancreas.
(D) Liver.

23.It is said that, "the ability to ruminate is advantageous for the ruminants". Explain the fact behind this concept

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

25.Where is the bile produced ?Which component of the food does it digest ?

26.Name the process of taking in food?

27.Digestion starts from ______ and ends in ______.
(A) Mouth, small intestine
(B) Mouth, large intestine
(C) Mouth, anus
(D) Mouth, rectum

28.Food is absorbed through-
(A) Villi.
(B) Blood.
(C) Blood platelets.
(D) Amylase.

29.Stomach secretes-
(A) Dilute hydrochloric acid.
(B) Dilute sulphuric acid.
(C) Dilute citric acid.
(D) Dilute nitric acid.

<2M>

30.Why do we get instant energy from glucose?

31.What are the main steps of digestion in humans?

32.What do you understand by animal nutrition

33.Define digestion.

34.What is digestive System?

35.Name the type of food and mode of feeding of the following animals
a) Ant
b) Mosquito

36.What are villi ?What is their location and function ?

37.Which teeth do you use for piercing and tearing?Write the number of these teeth

38.What is meant by alimentary canal ?

39.What is the function of premolars and molars?Write the number of both teeth in each jaw.

40.Label the various part of the system shown :

41.How many types of teeth do you find in humans? Name them.

42.What is the cause of diarrhoea ?

43.What is the function of liver

44.Write one similarity and one difference between the nutrition in amoeba and human beings.

<3M>

45.Draw diagram : Digestive system of human beings

46.show diagrammatically regions of the tounge for different tastes.

47.Write the functions of the tongue.

48.What is the rolw of lymph and lymphatic ducts in a villus

49.Explain the digestion in grass eating animals

50.Why do we get Hicups>

51.How food moves in the opposite direction during vomiting?

52.Explain the process of digestion in stomach.

53.What is the difference between milk teeth and permanent teeth?

54.Name the type of carbohydrate that can be digested by ruminants but not by humans.

55.What do you understand by rumen and rumination?

<5M>

56.What are the products of digestion of:
(a) Carbohydrates
(b) Fats Proteins

57.How amoeba obtains Its nutrition 7 Explain.

58.What are ruminants 7 How they are able to digest cellulose 7

59.what are the points one should take to prevent tooth decay?

60.Give only the function of:
(a) Duodenum
(b) Liver
(c) Gall bladder Bile

61.Write a note on stomach.

62.What are villi? What is their function?

63.Write a short note on structure and feeding in amoeba.

64.Write short notes on:
(a) The stomach
(b) The liver

65.What do you understand by alimentary canal or digestive tract?

66.What are the types of teeth and their function in human beings

Q1. Fill ups:

a) _________ and __________ secretes digestive juices.

b) Digestive system includes ___________________ and _________________.

c) The components of food which are necessary for our body are called ______________.

d) Oesophagus opens into ______________ which opens into _____________.

e) ___________ and ______________ are chewing and grinding teeth.

f) Bile juice is secreted by __________ and stored by ______________.

g) Length of small intestine is _________m and of large intestine is ________m.

h) ___________ and ________________ are examples of ruminants.

i) Grass is rich in ___________ which is a type of ______________.

j) In humans the undigested food is removed through __________ and he process is called _______________.

Q2. Name the following:

a) Food of lice -

b) Process of taking food in the body –

c) Glands present in mouth –

d) Figure like projections on small intestine –

e) Simpler form of proteins –

f) Last chamber of large intestine –

g) False foot in Amoeba –

h) Killing of bacteria occurs in this part if digestive canal –

Q3. What does the inner lining of the stomach secrete?

Q4. Explain how digestion occurs in grass eating animals?

Q5. Write the functions of different types of teeth.

Q6. List the various compartments of Digestive Tract?

Q7. Explain the structure of Stomach and Small Intestine?

Q8. How a starfish obtains its food?

Q9. Explain the absorption of food in small intestine?

Q10. What is the role of saliva in digestion?

Q11. During a school recess students were eating their lunch in a hurry. One of the student, Aarti, asked them to eat slowly and to chew the food properly otherwise it can cause hiccups and choking.
(1) What do you think is the reason behind such an advice?
(2) Which type of teeth helps in chewing of food?
(3) What values are shown by Aarti over here?

Q12. No digestion occurs in large intestine yet its role is important. Justify the statement.

Q13. What are the different modes of feeding in animals?

Q14. Our stomach contains hydrochloric acid, but we don’t experience any burning sensation. Why?

Q15. What happens during assimilation of food in man?

Q10. Tick the correct option:

a) The carbohydrates get broken into:
1. Glucose 2.Amino acids 3. Glycerol 4. Fatty Acids

b) The fats get broken into:
1. Fatty Acids 2. Glycerol 3. Amino Acids 4. Both 1. And 2.

c) Digestion of starch starts in :
1. Buccal Cavity 2. Stomach 3. Small Intestine 4. Liver

d) Digestion does not include which one of the following steps:
1. Chewing 2. Digestion 3. Assimilation 4. None of these

Fill in the blanks:

1. The mode of taking food into the body is called ___________________

2. In the process of ________________ food is broken down in to simpler substances.

3. The _______________ canal start with mouth and ends in anus.

4. ___________________glands are present in mouth.

5. Saliva helps in the digestion of ___________________ in food.

6. _____________ are the sensory cells present in mouth.

7. The digestive juices of the stomach digest the _____________ in the food.

8. The ________________released by the bacteria in the mouth causes tooth decay.

9. Liver secretes ____________ and helps in the digestion of ____________in the food.

10. During the process of digestion, the carbohydrates break down to _________, the proteins into ______________ and the fats into ______________.

11. Faecal matter is removed from the body by the process of __________

12. _____________ of amoeba helps to capture food.

13. The patient suffering diarrhea should be treated with ___________.

14. We get hiccups or cough, if by chance food particles enters the ____

15. Partially digested food in the rumen of herbivores is called ________

16. The process of utilizing absorbed food particles(nutrients) into the living cells is called ________________.

Name the following :

1. 4 types of teeth.

2. Digestive glands in human body.

3. Acid produced in stomach.

4. Scientist who discovered the working of stomach.

5. The sac like structure present between the small intestine & large intestine in ruminants.

True or False :

1. Canines are meant for tearing flesh.[ ]

2. Oesophagus is also known as food pipe.[ ]

3. Mouth cavity contains teeth and salivary glands only.[ ]

4. Deer is a ruminant.[ ]

5. Large intestine is longer than small intestine. [ ]

Define :

1. Digestion. 2. Rumination
Distinguish between : Milk teeth and permanent teeth
Draw and label: The human digestive system

2) The feeding and digestion in Amoeba