Q:

What is not included in connective tissues?

A:

There are three broad types of tissue not included in connective tissue: epithelial, muscular and nervous. Epithelial tissue includes the skin, muscular tissue includes the muscles and the heart, and nervous tissue includes the brain and the nerves, according to Math/Science Nucleus.

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There are a total of four types of tissue in the body: connective, muscular, nervous and epithelial. Muscular tissue comes in three forms: the various muscle groups (skeletal), the heart (cardiac), and the stomach and intestines (smooth). Epithelial tissue cells have a wide range of shapes and form the boundaries of the body, the outer layer of skin and the inner linings of body cavities. Nervous tissue makes up the central nervous system and the peripheral nervous system, including the white and gray matter of the brain, neurons, and ganglion structures, reports Math/Science Nucleus.

Of these, connective tissues are probably the most varied, including everything from powerful tendons to fragile neural membranes to blood itself, states the University of Oklahoma Health Sciences Center. The purpose of connective tissue is to support and protect the rest of the cells in the body. They link muscles, sheath the heart and even make up the leukocytes, or white blood cells, that defend the body.

Connective tissue works in concert with epithelial tissue to form the ears and the nose with a balance of cartilage and skin that allows for movement and flexibility while still maintaining enough strength to shield the sensitive neural tissues that carry sensory information to the brain, according to Encyclopedia Britannica.

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