[ays_quiz id=”147″]

Class 7 → Science → Chapter 9: Life Processes in Animals

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I. Chapter Summary:

This chapter explains the essential life processes that occur in animals to maintain life. It focuses on processes like nutrition, respiration, circulation, excretion, and movement. Students learn how different organ systems work together in animals and humans to carry out these functions and ensure survival.

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II. Key Concepts Covered:

• Life Processes:
  Basic activities necessary for living organisms to survive.
• Nutrition in Animals:
  • Ingestion → Taking in food
  • Digestion → Breaking down food
  • Absorption → Nutrients absorbed into blood
  • Egestion → Removal of waste
• Respiration:
  Process of breathing and releasing energy from food.
• Circulation:
  Transport of oxygen, nutrients, and waste through blood.
• Excretion:
  Removal of waste substances from the body.
• Movement:
  Animals move using muscles and bones.
• Human Digestive System:
  Organs involved in digestion like mouth, stomach, intestines.

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III. Important Questions:

(A) MCQs (1 Mark):

1. Life processes are:
   (a) Optional activities
   (b) Essential activities for survival ✅
   (c) Only breathing
   (d) Only eating
2. Digestion means:
   (a) Eating food
   (b) Breaking down food ✅
   (c) Absorbing food
   (d) Removing waste
3. Respiration releases:
   (a) Water
   (b) Energy ✅
   (c) Food
   (d) Blood
4. Blood helps in:
   (a) Digestion
   (b) Circulation of substances ✅
   (c) Movement
   (d) Thinking

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IV. Key Formulas/Concepts:

Basic respiration concept:

Food+Oxygen→Energy+Carbon dioxide+Watertext{Food} + text{Oxygen} rightarrow text{Energy} + text{Carbon dioxide} + text{Water}Food+Oxygen→Energy+Carbon dioxide+Water

• Nutrition → Intake and use of food
• Respiration → Release of energy
• Circulation → Transport of substances
• Excretion → Removal of waste

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(B) Short Answer Questions (2/3 Marks):

1. What are life processes?
2. What is digestion?
3. What is respiration?
4. What is circulation?

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(C) Long Answer Questions (5 Marks):

1. Explain the process of nutrition in animals.
2. Describe the human digestive system.
3. Explain respiration and its importance.
4. Describe circulation and excretion.

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(D) HOTS Questions:

1. Why are life processes essential for survival?
2. How do different organ systems work together in the body?

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V. Deleted Portions (CBSE 2025–2026):

No portions have been deleted from this chapter as per the rationalized NCERT textbooks.

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VI. Chapter-Wise Marks Bifurcation (Estimated – CBSE 2025–2026):

Unit/Chapter	Estimated Marks	Type of Questions Typically Asked
Life Processes in Animals	6–8 Marks	MCQs, Short Answers, Diagram-based, Case-based

Note: This is an estimate. Actual marks distribution may vary.

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VII. Previous Year Questions (PYQs):

1 Mark:

• What is digestion? (CBSE 2020)

2/3 Marks:

• Define respiration. (CBSE 2019)
• What is circulation? (CBSE 2021)

5 Marks:

• Explain nutrition in animals. (CBSE 2022)
• Describe digestive system. (CBSE 2023)

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VIII. Real-World Application Examples:

• Eating food provides energy for daily activities.
• Breathing supplies oxygen to the body.
• Blood carries nutrients to all parts of the body.
• Waste removal keeps the body healthy.

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IX. Student Tips & Strategies for Success:

Time Management:

• Study each life process separately.

Exam Preparation:

• Practice diagrams of digestive system.
• Learn definitions and processes clearly.

Stress Management:

• Use flowcharts to understand processes.
• Revise regularly.

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X. Career Guidance & Exploration:

• Science Stream: Medicine, Biology, Nursing
• Commerce Stream: Healthcare Management
• Arts Stream: Health Education

Entrance Exams:

• NEET (Medical)
• CUET (Biology)
• Nursing entrance exams

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XI. Important Notes:

• Understand each life process clearly.
• Practice diagrams and labeling.
• Use examples for better understanding.
• Refer NCERT textbook for accuracy.