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The enteric nervous system functions to control the gastrointestinal system.

Both autonomic and enteric nervous systems function involuntarily.

In the human brain, it is estimated that the total number of glia roughly equals the number of neurons, although the proportions vary in different brain areas.

Among the most important functions of glial cells are to support neurons and hold them in place; to supply nutrients to neurons; to insulate neurons electrically; to destroy pathogens and remove dead neurons; and to provide guidance cues directing the axons of neurons to their targets.

Nervous tissue first arose in wormlike organisms about 550 to 600 million years ago.

In vertebrate species it consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The PNS consists mainly of nerves, which are enclosed bundles of the long fibers or axons, that connect the CNS to every other part of the body.

It was in the decade of 1990 that molecular mechanisms of behavioral phenomena became widely known (Eric Richard Kandel)." A microscopic examination shows that nerves consist primarily of axons, along with different membranes that wrap around them and segregate them into fascicles.

The neurons that give rise to nerves do not lie entirely within the nerves themselves—their cell bodies reside within the brain, spinal cord, or peripheral ganglia Glial cells (named from the Greek for "glue") are non-neuronal cells that provide support and nutrition, maintain homeostasis, form myelin, and participate in signal transmission in the nervous system.Nerves that transmit signals from the brain are called motor or efferent nerves, while those nerves that transmit information from the body to the CNS are called sensory or afferent.Most nerves serve both functions and are called mixed nerves.Datingnmore offers absoutely free Colombia dating, as well as many other singles all over the world.The nervous system is the part of an animal's body that coordinates its actions and transmits signals to and from different parts of its body.As one of the largest Colombian dating sites, we have thousands of Colombian women signing up everyday interested in meeting someone like you.