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Revision Notes

Life Processes in Animals — Revision Notes

CBSE · Class 7 · Science

Life Processes in Animals revision notes for CBSE Class 7 Science: 4 topics in quick points. Part of the CBSE Class 7 Science syllabus.

39 questions80 flashcards5 concepts

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Key Topics to Revise

1

1. Life Processes and the Alimentary Canal

  • Life processes are essential for survival.
  • The alimentary canal starts in the mouth and ends at the anus.
  • Digestion begins in the mouth, but food is only partially digested there.
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2. Digestion in the Mouth, Stomach, and Small Intestine

  • Teeth break food into smaller pieces by crushing and chewing.
  • Saliva contains a digestive juice that helps break down starch into sugar.
  • Chewed starchy food can taste sweet because starch starts changing into sugar in the mouth.
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3. Large Intestine, Stool, and Egestion

  • The large intestine is about 1.5 metres long.
  • It is shorter but wider than the small intestine.
  • The large intestine absorbs water and some salts from undigested food.
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4. Special Digestion in Animals

  • Grass-eating animals such as cows and buffaloes are called ruminants.
  • Ruminants partially chew grass, swallow it, partially digest it in the stomach, and then bring it back to the mouth for rumination.
  • A cow spends about 8 hours a day just chewing food.

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Full Notes

Key Concepts

Life processes are the basic activitiesThe alimentary canal is a longIn the mouthThe stomach churns food and releasesThe small intestine is the longest

Frequently Asked Questions

What are the important topics in Life Processes in Animals for CBSE Class 7 Science?
Key topics in Life Processes in Animals include Life Processes and the Alimentary Canal, Digestion in the Mouth, Stomach, and Small Intestine, Large Intestine, Stool, and Egestion, Special Digestion in Animals. Study these first, then practise questions on each for Class 7 exams.
How should I revise Life Processes in Animals for Class 7 exams?
Learn the core ideas first, then work through the 39 practice questions on Life Processes in Animals. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All CBSE Class 7 Science Revision Notes

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