Chapter-Chapter 9. Life Processes in Animals Science Curiosity class 7 in english Medium CBSE Notes

Chapter 9: Life Processes in Animals

Definitions:

Life Processes: Life processes are the basic activities that are essential for maintaining life.

Nutrition: Nutrition is the process of taking in food and using it for energy, growth, and repair.

Ingestion: Ingestion is the process of taking food into the body.

Digestion: Digestion is the process of breaking down complex food into simpler substances.

Absorption: Absorption is the process of taking digested food into the bloodstream.

Assimilation: Assimilation is the process of using absorbed nutrients for energy and growth.

Egestion: Egestion is the process of removing undigested waste from the body.

Respiration: Respiration is the process of taking in oxygen and releasing carbon dioxide to produce energy.

Aerobic Respiration: Respiration that occurs in the presence of oxygen.

Anaerobic Respiration: Respiration that occurs in the absence of oxygen.

Circulatory System: The system that transports blood, nutrients, and gases throughout the body.

Excretion: Excretion is the process of removing waste products from the body.

Quick Revision Points:

• Life processes are necessary for survival.
• Nutrition provides energy and growth.
• Digestion breaks food into simpler forms.
• Absorption takes nutrients into blood.
• Respiration releases energy from food.
• Aerobic respiration needs oxygen.
• Anaerobic respiration does not need oxygen.
• Circulatory system transports substances.
• Excretion removes waste from the body.
• All life processes are interconnected.

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