Thus, diseases, including cancer, of bone a classified separately from soft tissue diseases, even though the same tissues may be involved. To understand disease of these, we must look at them on their cellular level. There are actually three types of muscle cells in the body, several types of fibrous cell, but only one type of fat and cartilage cell. The blood vessles are made up of layers of various types of cells. In a growing bone, the cells lay down cartilage which is formed of various condroitin proteins.
Cartilage is nourished by diffusion of tissue fluid.
Rhabdomyo - means arising from the striated, or skeletal muscle. Muscles often have specific vessels that feed them. This type of muscle occurs as linings within organs, arranged in circular or longi- tudinal patterns. It is not under voluntary control, but instead controlled by the autonomic nervous system - by the body itself. Examples of this kind of muscle are contracting linings of the intestines, uterus, and blood vessels.