Chapter 6 – Life Processes

CBSE Class 10 Science Chapter 6 - Life Processes

Brief Information: NCERT Class 10 Science Chapter 6 explains Life Processes. There are six life processes that all living organisms perform. They are movement, respiration, growth, reproduction, excretion and nutrition. The chapter also teaches about nutrition which means the process of taking in food and using it for growth, metabolism and repair. Nutritional stages are ingestion, digestion, absorption, transport, assimilation, and excretion. Nutrition is further divided into Autotrophic Nutrition and Heterotrophic Nutrition. Autotrophic nutrition involves the intake of simple inorganic materials from the environment and using an external energy source like the Sun to synthesize complex high-energy organic material. Heterotrophic nutrition involves the intake of complex material prepared by other organisms. Different types of heterotrophic nutrition are parasitic nutrition, saprophytic nutrition and holozoic nutrition. The next topic is nutrition in human beings. The various steps of nutrition are ingestion, digestion, Oesophagus, stomach, small intestine, bile, absorption, assimilation and egestion. The next subtopic is respiration in which the human respiratory system is explained beautifully. The different elements of the human respiratory system are lungs, bronchi, larynx, pharynx, etc. During the process of respiration, organic compounds such as glucose are broken down to provide energy in the form of ATP. ATP is used to provide energy for other reactions in the cell.

Respiration may be aerobic or anaerobic. Aerobic respiration makes more energy available to the organism. For plants, the soil is the nearest and richest source of raw materials like nitrogen, phosphorus and other minerals. In human beings, the transport of materials such as oxygen, carbon dioxide, food and excretory products is a function of the circulatory system. The circulatory system consists of the heart, blood and blood vessels. In highly differentiated plants, transport of water, minerals, food and other materials is a function of the vascular tissue which consists of xylem and phloem. In human beings, excretory products in the form of soluble nitrogen compounds are removed by the nephrons in the kidneys. Plants use a variety of techniques to get rid of waste material.

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Chapter 6 – Life Processes
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