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Brain is the part of the nervous system that is enclosed in the skull .
All vertebrates (animals with backbones ) fork out well-developed thoughts
most invertebrates (animals without backbones ) do not have true mentalitys .
Instead , they have groups of bosom cells called nerve nets , nerve cords ,
or ganglia . This article is concerned almost solo with the human
brain .
The human brain is an extension of the spinal anaesthesia cord , and with it makes u
the central nervous system . It run offs billions of neurons , or nerve
cells , each with more than 10 ,000 synapses , or connections to separate
neurons . No two brain cells but it can swing dead or damaged cells to
nervous strain new synapses surrounded by existing cells (Corrick , 2003 .
The brain receives data from all parts of the consistency and sends out
instructions to the dust s heterogeneous organs and systems . The information
and instructions travel through the brain in the form of nerve impulses ,
electrical signals that elicit chemical changes . The impulses travel
along the neurons and move from one neuron to the next across the
synapses by means of chemicals called neurotransmitters . It is through
nerve impulses that the brain controls such activities as voluntary and
involuntary movement .




The brain is connected with the horse sense organs , muscles of the head , and
internal organs of the body by 12 pairs of cranial nerves , carry
impulses from the brain to various parts of the body . Others , called
sensory nerves , carry impulses from the body back to the brain . Most
pairs of cranial nerves contain one motor and one sensory nerve a few
pairs contain sensory nerves only .
The brain consists of two types of tissue (1 ) nerve cells , or gray
bailiwick and (2 ) suited nerve fibers , or white matter . The sheath is
composed of myelin , a fatty protein that protects and insulates the
fibers (Kolb , 2005 .
A bulky number of blood vessels carry nourishment to the brain . The
brain extracts certain...If you want to get a full essay, order it on our website: Ordercustompaper.com



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