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What cells does the CNS have
- ependymal cells
- astrocytes
- oligodendrocytes
- microglia
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what are ependymal cells
- they line central canal and ventricles
- +produce cerebrospinal fluid
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what are astrocytes
- they are associated with blood brain barrier
- regulate enviroment around neurons in CNS [homeostasis]
- structural support
- absorb+ recycle neurotransmitters
- form scar tissue after injury
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what are oligodendrocytes
- they form myelin sheath in CNS
- provide structural framework
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what are microglia
- they are phagocytes
- remove cell debris, waste and pathogens
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what extends the whole way down the spinal cord and is filled with CSF
the central canal
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what is the central canal filled with
it is filled with CSF [cerebrospinal fluid]
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what are ventricles
ventricles are the larger area within the brain
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what does the CSF do
it provides protection, transports gases, nutrients, waste.
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what cells does the PNS have
- satellite cells
- schwann cells
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what do satellite cells do
- satellite cells regulate enviroment around neurons in PNS [homeostas]
- surround neuron cell bodies in ganglia
- regulate O2, CO2, nutrient and neurotransmitter levels around neurons in ganglia.
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what do schwann cells do
- they form myelin sheath in PNS
- they participate in repair process after injury
- are responsible for myelination of peripheral axons
- surrounds axons in PNS
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