Bitesize has changed! We're updating subjects as fast as we can. Visit our new site to find Bitesize guides and clips - and tell us what you think!
Print

Science

Organs in animals

Page:

  1. 1
  2. 2
  3. 3
  1. Next

Multicellular organisms usually contain differentiated cells, adapted for specific functions. Tissues consist of groups of similar cells. Organs contain different tissues, working together to carry out particular functions. Organ systems contain different organs. The different organ systems work together in an organism.

Tissues

During the development of a multicellularmulticellular: Having more than one cell organism, cells differentiate so that they can carry out different functions. Differentiation is the process by which a cell becomes a specialised type of cell.

A tissue is a group of specialised cells that have a similar structure and function. The table shows some examples of tissues and their functions.

Types of tissues and their functions

TissueFunction
Muscular tissueContracts, bringing about movement
Glandular tissueProduces substances such as enzymesenzymes: Proteins which catalyse or speed up chemical reactions inside our bodies and hormoneshormones: Chemical messengers produced in glands and carried by the blood to specific organs in the body
Epithelial tissueCovers some parts of the body

Page:

  1. 1
  2. 2
  3. 3
  1. Next

Back to Tissues, organs and organ systems index

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.