Course Content
TRANSPORT IN PLANTS AND ANIMALS
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EXCRETION AND HOMEOSTASIS
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Biology Form 2
About Lesson

Introduction

Respiration is the process by which food substances are chemically broken down in all living cells to release energy, Carbon (IV) oxide, water or alcohol.

It is also referred to as tissue respiration or internal respiration to distinguish it from gaseous exchange which is also known as external respiration.

Significance of Respiration

Animals require energy for;

  • Muscle contraction during movements.
  • Sending impulses through the nerves.
  • Growth
  • Keeping warm.

Plants require energy for;

  • Growth
  • Absorption of mineral salts from soil.
  • Translocation/transporting manufactured food.
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