The spiny lizards are medium to large lizards up to 10 inches long. They have keeled, pointed scales that are usually a subdued gray or tan, a wide purple stripe down the back and scattered turquoise scales mixed with tan and brown on the back and sides.he lizards grow out of their skins and usually shed in patches rather than in one piece like a snake. The spiny lizards eat insects, other lizards, and some plant material such as leaves, berries, and flowers. They are preyed upon by snakes, coyotes, and birds of prey.
Cells of nervous tissue. Nervous tissue is the main component of the two parts of the nervous system; the brain and spinal cord of the central nervous system (CNS), and the branching peripheral nerves of the peripheral nervous system (PNS), which regulates and controls bodily functions and activity.ells of nervous tissue. Nervous tissue is the main component of the two parts of the nervous system; the brain and spinal cord of the central nervous system (CNS), and the branching peripheral nerves of the peripheral nervous system (PNS), which regulates and controls bodily functions and activity.
Connective tissue (CT) is one of the four types of biological tissue that support, connect, or separate different types of tissues and organs in the body. The other three types are epithelial, muscle, and nervous tissue.Connective tissue is found in between other tissues everywhere in the body, including the nervous system. In the central nervous system the outer membranes, the meninges, that cover the brain and spinal cord are composed of connective tissue.ther kinds of connective tissues include fibrous, elastic, and lymphoid connective tissues. Fibroblasts are the cells responsible for the production of some CT. Type-I collagen, is present in many forms of connective tissue, and makes up about 25% of the total protein content of the mammalian body.