The document details the nervous system, focusing on neurons, synapses, and glia. It explains neuron structure and function, the role of synapses in transmitting signals, and the support functions of glial cells. Emphasis is placed on understanding neural communication and support mechanisms in bra...
,• 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 pe
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 con
the CNS to the body.
• Elements of this system develop from neural crest cells and as outgrow
the CNS.
• The PNS consists of the spinal and cranial nerves, visceral/autonomic n
and plexuses (plexus = network of nerves or vessels), and the enteric s
They monitor conditions inside and outside of the body and send this
information to the CNS.
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