Biology Form 4
About Lesson

The Endoskeleton

Found in vertebrates.

In vertebrates, the muscles are external to the hard framework.

It is made up of living tissues i.e. cartilage or bone.

These tissues grow steadily within the animal body and therefore do no necessitate moulting to allow for growth.

Functions of the Endoskeleton

  • Support the animal body weight and gives the body its shape.
  • Protects delicate internal organs from mechanical injury e.g. heart, lungs, brain.
  • Provides surface for attachment of muscles that bring about movement.
  • Bones produce blood cells.
  • Bones act as reservoir of Calcium and phosphate ions in the body.
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