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1
it is composed of a basic type of cellit is composed of a basic type of cell, aka
neuron, nerve cell
2
the neuron is the functional unit of the nervous system.
neuron
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The typical vertebrate nervous system is composed of the:
central nervous system, cns, peripheral nervous system, pns
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serves as the body's command center, consists of the brain and the spinal cord.
central nervous system
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composed of a network of sensory and motor nerves that extend throughout the body
peripheral nervous system
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what is the pns composed of
sensory nerves, motor nerves
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the motor nerves are divided into two
somatic, autonomic
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There are two types of cells that comprise the nervous system.
neurons, glial cells or neuroglia
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are the nerve cells that transmit signals or impulses throughout the body.
neurons
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they Surround the neurons are non-nervous cells,
glial cells or neuroglia
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the most numerous glial cells, act as macrophages, help keep a stable chemical environment near neurons and supply them with oxygen and nutrients.
astrocytes
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The basic unit of the nervous systemThe basic unit of the nervous systemThe basic unit of the nervous system
neurons
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the neuron has a large nucleus described as the owl's eye nucleus.
cell body
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are highly branched processes that receive stimuli from other neurons.
dendrites
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arises from the cell body carries impulses to adjacent neurons.
axon
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In vertebrates, the axon is covered with a
myelin sheath
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name
nucleus, dendrites, cell body, axon, terminal endings, myelin sheath, nodes of ranvier
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three distinct regions of the brain
cerebrum, cerebellum, brain stem
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crebrum is also called what
cerebral cortex
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what are the hemispheres of the brain
left hemisphere, right hemisphere
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each cerebral hemisphere is divided into four lobes
frontal lobe, parietal lobe, temporal lobe, occipital lobe
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center for muscle coordination and equilibrium
cerebellum
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composed of midbrain, pons and medulla oblongata
brain stem
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cerebellum-work in coordination to regulate basic body functions
pon
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cerebellum-survival functions
medulla oblongata
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cerebellum-relay station cord
midbrain
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measures 43-45cm
spinal cord