Life Processes in Animals
CBSE · Class 7 · Science
Quick revision notes for Life Processes in Animals — CBSE Class 7 Science. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Nutrition in Animals - Human Digestive System
- Nutrition involves breaking down complex food into simpler forms that the body can use
- The alimentary canal is a long tube (about 8-9 meters) where digestion occurs
- Digestion starts in the mouth and ends at the anus
Journey of Food Through Digestive System
- Mouth: Teeth break food mechanically, saliva breaks down starch to sugar
- Oesophagus: Food pipe with wave-like contractions pushes food to stomach
- Stomach: Churns food, gastric juice breaks proteins, acid kills bacteria, mucus protects walls
Respiration in Animals - Human Respiratory System
- Breathing is the physical process of inhaling and exhaling air
- Respiration is the chemical process that uses oxygen to release energy from glucose
- Respiratory system includes nostrils, nasal passages, windpipe, lungs, and diaphragm
Adaptations in Different Animals
- Different animals have different digestive and respiratory systems based on their habitat and food
- Birds have gizzard instead of teeth to break down food using small stones
- Fish use gills for breathing underwater - extract dissolved oxygen from water
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Life Processes in Animals covers several key topics that are frequently asked in CBSE Class 7 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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