connective tissue, tissue that supports and binds other body tissue and parts. It derives from the mesoderm of the embryo and is dense, containing large numbers of cells and large amounts of intercellular material. The intercellular material is composed of fibers in a matrix or ground substance that may be liquid, gelatinous, or solid, such as in bone and cartilage. Connective tissue fibers may be collagenous or elastic. The matrix or ground material surrounding fibers and cells is a dynamic substance, susceptible to its own special diseases. Kinds include bone tissue, dense connective tissue, fibrous tissue, loose connective tissue, cartilage tissue.