Cellcell interactions

Metazoans consist of many different cell types, whose functions are closely interlinked. Only together can they perform all the functions that characterise a living organism: Attaining shape, movement, perception, metabolism and reproduction.

We will now see how all these cells are knitted into a single organism.

Before we start first a few definitions: If several cells of the same type come together, they form a tissue, of which there are 4 basic types: epithelial, connective, muscular and neural. Several different tissues together can form organs, which are functionally and anatomically distinct parts of our body.

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