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Different Tissues

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  • Essay length: 939 words
  • Submitted: 04/03/2005
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AS and A Level Healthcare

The first 200 words of this essay...

Human Biology Assignment One

Tissues by Victoria Jackson

Tissues are defined as a group of associated, similarly structured cells that with their ground substance act together in the performance of a specialised function for the survival of the multicellular organism. The tissues are classified into four main groups which are epithelial, connective, muscle and nervous.

(http://encarta.msn.com/encyclopedia accessed 08 October 2004)

Epithelial Tissues

Epithelial tissues form the covering of all body surfaces with the functions being to provide protective covering, absorption, secretion, diffusion, sensation and contractility. They are tightly packed together with little intercellular matrix and can be squamous (flattened or scale like), cuboidal (cube), or columnar (cylindrical or column like) in shape and may be arranged in single or multiple layers.

I have chosen to look more into Ciliated Columnar Epithelium;

This is a tall column like cell with a nucleus at the bottom near the basement membrane, with cilia and lots of cytoplasm above the nucleus. Examples of where this can be found are in respiratory tracts and the fallopian tubes. The cilia move together in a wave motion so mucus and other foreign particles are expelled. Goblet cells are usually

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