NCERT science class 7 ch 2 solutions. Welcome to Station Vidya, your one-stop platform for accurate and student-friendly NCERT solutions! In this post, we present Chapter 2 – Nutrition in Animals from Class 7 Science. Below you’ll find all the NCERT exercise questions with detailed answers, NCERT science class 7 ch 2 solutions.
NCERT science class 7 ch 2 solutions
📘 Chapter Overview
In this chapter, we explore how animals get their food, the process of digestion, different modes of feeding, and the role of various digestive organs. The chapter covers concepts such as ingestion, digestion, absorption, assimilation, and egestion.
Exercise Questions and Answers: Chapter 2 – Nutrition in Animals
Q1. Fill in the blanks:
(a) The main steps of nutrition in humans are ________, ________, ________, ________, and ________.
(b) The largest gland in the human body is ________.
(c) The stomach releases hydrochloric acid and ________ juices which act on food.
(d) The inner wall of the small intestine has many finger-like outgrowths called ________.
(e) Amoeba digests its food in the ________.
✅ Answer 1:
(a) Ingestion, digestion, absorption, assimilation, egestion
(b) Liver
(c) Digestive
(d) Villi
(e) Food vacuole
Q2. Mark ‘T’ if the statement is true and ‘F’ if it is false:
(a) Digestion of starch starts in the stomach.
(b) The tongue helps in mixing food with saliva.
(c) The gall bladder temporarily stores bile.
(d) The ruminants bring back swallowed grass into their mouth and chew it for some time.
✅ Answer 2:
(a) False
(b) True
(c) True
(d) True
Q3. Tick (✓) mark the correct answer in each of the following:
(a) Fat is completely digested in the
(i) Stomach
(ii) Mouth
(iii) Small intestine
(iv) Large intestine
(b) Water from the undigested food is absorbed mainly in the
(i) Stomach
(ii) Food pipe
(iii) Small intestine
(iv) Large intestine
✅ Answer 3:
(a) (iii) Small intestine
(b) (iv) Large intestine
Q4. Match the items in Column I with those given in Column II:
| Column I | Column II |
|---|---|
| (a) Food components | (i) Bile juice |
| (b) Stomach | (ii) Absorption of water |
| (c) Liver | (iii) Digestion |
| (d) Rectum | (iv) Storage of undigested food |
| (e) Small intestine | (v) Digestion and absorption |
✅ Answer 4:
| Column I | Column II |
|---|---|
| (a) Food components | (iii) Digestion |
| (b) Stomach | (iii) Digestion |
| (c) Liver | (i) Bile juice |
| (d) Rectum | (iv) Storage of undigested food |
| (e) Small intestine | (v) Digestion and absorption |
Q5. What are villi? What is their location and function?
✅ Answer 5:
Villi are finger-like projections found on the inner walls of the small intestine.
Function:
- They increase the surface area for the absorption of digested nutrients into the blood.
Q6. Where is the bile produced? Which component of the food does it help to digest?
✅ Answer 6:
Bile is produced in the liver and stored in the gall bladder.
It helps in the digestion of fats by breaking them into smaller globules (emulsification), which aids in easier digestion.
Q7. Name the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.
✅ Answer 7:
The carbohydrate is cellulose.
Reason: Ruminants have a special stomach chamber called the rumen that contains bacteria capable of digesting cellulose. Humans lack such bacteria and the rumen.
Q8. Why do we get instant energy from glucose?
✅ Answer 8:
Glucose is a simple sugar that is easily absorbed into the bloodstream and quickly broken down to release energy. Therefore, it provides instant energy to the body.
Q9. Which part of the digestive canal is involved in:
(i) Absorption of food
(ii) Chewing of food
(iii) Killing of bacteria
(iv) Complete digestion of food
(v) Formation of faeces
✅ Answer 9:
(i) Small intestine
(ii) Mouth (Buccal cavity)
(iii) Stomach (due to hydrochloric acid)
(iv) Small intestine
(v) Large intestine
Q10. Write one similarity and one difference between the nutrition in amoeba and human beings.
✅ Answer 10:
Similarity: Both amoeba and humans perform digestion of food.
Difference: Amoeba ingests food using pseudopodia, while humans use specialized organs like the mouth, stomach, and intestines.
Q11. Match the items of Column I with suitable items in Column II
| Column I | Column II |
|---|---|
| (a) Salivary gland | (i) Bile juice secretion |
| (b) Stomach | (ii) Storage of undigested food |
| (c) Liver | (iii) Saliva secretion |
| (d) Rectum | (iv) Acid release |
| (e) Small intestine | (v) Digestion completed |
| (vi) Taste detection |
✅ Answer 11:
| Column I | Column II |
|---|---|
| (a) Salivary gland | (iii) Saliva secretion |
| (b) Stomach | (iv) Acid release |
| (c) Liver | (i) Bile juice secretion |
| (d) Rectum | (ii) Storage of undigested food |
| (e) Small intestine | (v) Digestion completed |
📌 Conclusion
Understanding the process of nutrition in animals helps students learn how our body functions and how food gets converted into energy. These Class 7 Science Chapter 2 solutions are tailored for better exam preparation, concept clarity, and NCERT syllabus adherence. NCERT science class 7 ch 2 solutions
Related article: https://stationvidya.com/class-7-chapter-1-nutrition-in-plants-question-answers/
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