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  • Created by: Fia1998
  • Created on: 27-01-14 17:57

Large multicellular organisms develop systems for exchanging materials. During the development of a multicellular organism, cells differentiate so that they can perform different functions.

A tissue is a group of cells with similar structureand function. Examples of tissues include:

  • muscular tissue, which can contract to bring about movement
  • glandular tissue, which can produce substances such as enzymes and hormones
  • epithelial tissue, which covers some parts of the body.

Organs are made of tissues. One organ may contain


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