Extremely hard matrix is due to deposition of calcium salts around protein fibers. Plasma contains a variety of inorganic and organic substances dissolved in water. Nervous Tissue a. The neuron conducts nerve impulses to and from brain and spinal cord. The cell body contains nucleus of a neuron.
Dendrites conduct impulses to cell body.
The axon conducts impulses away from cell body. Dendrites and axons are termed nerve fibers and many are bound together to make up a nerve . Dead cells at top contain keratin , a waterproof protein. Dandruff occurs when rate of keratinization is 2- 3 times higher. Melanocytes produce melanin, the pigment responsible for skin color that protects skin from ultraviolet radiation in sunlight.