THE NERVOUS SYSTEM
,• The nervous system can be separated into parts based on structure and
function:
• Structurally, it can be divided into the central nervous system (CNS) and the
peripheral nervous system (PNS)
• Functionally, it can b e divided into somatic and visceral/autonomic parts.
• The CNS is composed of the brain and spinal cord.
• The PNS is composed of all nervous structures outside the CNS that
connect the CNS to the body.
• Elements of this system develop from neural crest cells and as
outgrowths of the CNS.
• The PNS consists of the spinal and cranial nerves, visceral/autonomic
nerves and plexuses (plexus = network of nerves or vessels), and the
enteric system. They monitor conditions inside and outside of the body
and send this information to the CNS.
,
,
,• The nervous system can be separated into parts based on structure and
function:
• Structurally, it can be divided into the central nervous system (CNS) and the
peripheral nervous system (PNS)
• Functionally, it can b e divided into somatic and visceral/autonomic parts.
• The CNS is composed of the brain and spinal cord.
• The PNS is composed of all nervous structures outside the CNS that
connect the CNS to the body.
• Elements of this system develop from neural crest cells and as
outgrowths of the CNS.
• The PNS consists of the spinal and cranial nerves, visceral/autonomic
nerves and plexuses (plexus = network of nerves or vessels), and the
enteric system. They monitor conditions inside and outside of the body
and send this information to the CNS.
,
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