The Function and Responsibility of the Nervous Tissue - Essay Example

Its two important parts are (1) Cell Body, which has the neurons nucleus, other organelles, and associated cytoplasm. (2) Nerve Processes are projection in the shape of a finger emanating from the cell body and they transmit signals. They are identified into two types, axons that carry signals away from the cell body and dendrites that take the signals toward the cell body.

The nervous system has many-fold functions and remains in command of the entire activities of the body and mind. The important ones are integration, sensory input, control of glands and muscles, homeostasis, and all mental activities. In brief, nervous tissue is the be-all and end-all of the functioning of the body and mind. The smallest and the routine, and the biggest and the most challenging functions are all in the domain of the nervous tissue. It reacts to stimuli, carries impulses to various organs in the body, and thus brings about the response to the stimulus.

These specialized cells also called neurons, are instantly stimulated and transmit impulses at great speed. Nervous tissue is organized into two basic systems. They are, “ (1) the Central Nervous System (CNS) and (2) the Peripheral Nervous System (PNS). The peripheral system responds to stimuli and sends impulses to the central system (brain and spinal cord). These impulses are interpreted by the CNS and then other impulses initiated in the CNS travel back through the PNS to effector organs to produce the proper response.

”(NERVOUS.) Neuron is the basic cell of the nervous system. Its structure is, “(1) the cell body, containing the nucleus and synthetic organelles; (2) the axon, a long cytoplasmic process associated with the cell body used to communicate with target organs; and (3) the dendrites, shorter cytoplasmic processes of the cell body used to communicate between neurons.”This starts at the surface of the cortex and moves inward. The first three layers of the cell bodies are identified thus: (1) superficial molecular layer, containing only a few small cell bodies; (2) outer granular layer, containing small round cell bodies; (3) pyramidal cell layer, containing cell bodies triangular in shape.

The other three layers are an inner granular layer, a polymorphic cell layer, and the internal pyramid layer. This is another part of brain gray matter, with three layers. (1) the superficial molecular layer that has mostly unmyelinated axons and few cell bodies; (2) a deeper layer of large flask-shaped cells named Purkinje cells and (3) an inner granular layer with many small cell bodies. The Purkinje cells transmit long dendrite projections into the molecular layer.