 Connective tissue CD is one of the 4 basic types of animal tissue, along with epithelial tissue, muscle tissue, and nervous tissue. It develops from the methaderm. Connective tissue is found in between other tissues everywhere in a body, including the nervous system. In the central nervous system, the 3-hour membranes the meninges that envelop the brain and spinal cord are composed of connective tissue. They support and protect the body. All connective tissue consists of 3 main components, fibers elastic and collagenous fibers, ground substance and cells. Not all authorities include blood to or lymph as connective tissue because they lack the fiber component. All are immersed in the body water. The cells of connective tissue include fiber blasts, adipocytes, macrophages, mast cells and vulcocytes. The term connective tissue in German, by the Jewelry was introduced in 1830 by Johannes Peter M.E.L.L.R. The tissue was already recognized as a distinct class in the 18th century.