Question
Differentiate between:
external and internal respiration

Answer

External repiration
  • It is the mechanical process of inhaling and exhaling air. It does not involve any enzymes.
  • It involves taking in oxygen and giving out carbon dioxide.
  • No energy is released.
  • It takes place outside the cell.
Internal respiration :
  • It is a complex biochemical process in which enzymes are involved.
  • It involves the oxidation of glucose into carbon dioxide, water and energy.
  • Energy is released and stored in the form of ATP.
  • It takes place inside the cell.

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