Definition Of An Organ

Organ 1

Organ 1

An organ is a collection of two or more of the basic body tissues, which together perform some specific body function. We have just said, for example, that the skin or integument is an organ, rather than a tissue. The skin contains all four of the basic or primary tissues. Its outermost layer is epithelial tissue. Its middle layer is mostly connective tissue. Nervous tissue with nerves and sensory receptors, densely supply the skin. And there is just a little bit of muscle tissue around the blood vessels in the skin.

Taken altogether, these four basic tissue types help make the skin our chief organ of protection and sensation.

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