| The nervous
system of the human being is
responsible for sending,
receiving, and processing nerve
impulses throughout the body. All
the organs and muscles inside
your body rely upon these nerve
impulses to function. It could be
considered as the master control
unit inside your body. Sense
organs provide the nervous system
with information about the
environment by means of such
senses as sight, hearing, smell,
taste, tough, pressure, and pain.
Nerves are connected throughout
the whole body to the brain. They
carry the information throughout
the body in the form of
electrochemical signals called
impulses. These impulses travel
from the brain and spinal cord to
the nerves located throughout the
body. For example, if we touch
something, impulses travel
through the nerve network to the
brain at a rate of 350 feet per
second. It is largely made up of
specialized cells called neurons.
Each of these neuron has a cell
body, or cyton, which contains
the nucleus and organelles. It
takes the corporation of three
system to carry out the mission
of the nervous system . They are
the central, the peripheral, and
the autonomic nervous systems. The
central nervous system has the
responsibility for issuing nerve
impulses and analyzing sensory
data, and includes the brain and
spinal cord.
The peripheral nervous system
is responsible for carrying these
nerve impulses to and from the
body? many structures, includes
the many craniospinal nerves
which branch off the brain and
the spinal cord.
The autonomic nervous system
is composed of the sympathetic
and parasympathetic systems and
is responsible for regulating and
coordinating the functions of
vital structures in the body.
|