Introduction of the nervous system?

Question

hi!

i would like a simple, brief introduction on the nervous system, introducing the brain, spinal cord, nerves and how the human body needs it....something like that

just a paragraph thanks

Answer 1

The nervous system is the major controlling, regulatory, and communicating system in the body. It is the center of all mental activity including thought, learning, and memory. Together with the endocrine system, the nervous system is responsible for regulating and maintaining homeostasis.



Through its receptors, the nervous system keeps us in touch with our environment, both external and internal.

Like other systems in the body, the nervous system is composed of organs, principally the brain, spinal cord, nerves, and ganglia. These, in turn, consist of various tissues, including nerve, blood, and connective tissue. Together these carry out the complex activities of the nervous system.

Take what you need.

Answer 2

The nervous system is a network of specialized nerve cells that conduct impulses from or to areas of the body to the brain and spinal cord and within the brain. It is composed of neurons and other specialized cells, like glial cells and neuroglia, that aid in the function of the neurons. Nerve cells are interconnected in complex arrangements and use electrochemical signals to transmit impulses between cells, they respond to a great variety of stimuli and form neural circuits that regulate an organisms perception and behavior. Nervous systems are found in many multicellular animals but differ greatly in complexity between species.

The human nervous system can be grouped into both with gross anatomy, (which describes the parts that are large enough to be seen with the naked eye,) and micro-anatomy, (which describes the system at a cellular level.) At gross anatomy, the nervous system can be grouped in distinct organs, these being actually stations which the neural pathways cross through. Thus, with a didactical purpose, these organs, according to their ubication, can be divided in two parts: the central nervous system (CNS) and the peripheral nervous system (PNS).

Hope that emailed..