Respiration: Respiration is a process of taking in oxygen, using i for release of energy by oxidation of food, and eliminating the waste products.(carbon dioxide & water)
The 2 main process of respiration are :
External Respiration (or) Breathing : means taking in air rich in oxygen(inhalation) and giving out air rich in carbon dioxide(exhalation).
Internal Respiration (or) Cellular Respiration : means using oxygen to break down food to release energy. Internal respiration occurs in the body cells.
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