CBSE · Class 7 · Science · Chapter 9

Life Processes in Animals

Explore nutrition, respiration, circulation and excretion as interconnected processes that keep animals alive.

7 lessons 45 min
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Lessons in this chapter

  1. 1Food’s Journey Begins: Mouth and Food PipeTrace the first stages of digestion and use evidence to explain what saliva does.
  2. 2How the Stomach and Small Intestine Digest FoodFollow the secretions and movements that make complex food components simpler.
  3. 3Absorption, Egestion, and Digestive HealthSee how nutrients reach the blood and how the remaining material leaves the body.
  4. 4The Human Respiratory System and BreathingFollow air into the lungs and explain how chest movements produce a breath.
  5. 5From Air and Food to Usable EnergyConnect gas exchange, blood transport, and the energy released from glucose.
  6. 6How Animals Adapt to Different Foods and HabitatsCompare rumination, gizzards, lungs, gills, and skin as solutions to shared life needs.
  7. 7Chapter Summary and PracticeRebuild the complete connection between digestion, breathing, transport, energy, and animal adaptations.
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