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Nervous system (Central nervous system (CNS) (Cerebrospinal fluid (CSF)…
Nervous system
Central nervous system (CNS)
Brain and spine
Grey matter
Sensory nuclei
Receive/ relay info from peripheral receptors
ex. touch receptors in skin
Motor Nuclei
Motor commands sent to peripheral effectors
Ex. Movement of skeletal muscle
White matter
Location of higher functions (memory, intelligence, learning and emotion
Cerebrospinal fluid (CSF)
watery, clear fluid
Fills central canal and ventricles around CNS
Provides cushioning, and transports
Neuroglia
Satellite Cell
Regulate material exchange between body cell and enviro.
Schwann Cells aka neurolemmocytes
Surrounds axon, form a mylin sheath for insulation
Peripheral Nervous System (PNS)
Afferent Division
Carries info TO CNS
Somatic
Carry info from skeletal muscles, joints, and the skin
Visceral
Carry info from internal structures
smooth muscle
Cardiac muscle
Efferent Division
Carries info AWAY from CNS
Visceral -(ANS) automatic nervous system
Regulates smooth/ cardiac muscle, and glandular activity
Somatic
Controls skeletal muscle contractions
Neuroglia
Microglia
removes cells wastes, debris and pathogens
Oligodendrocytes
Myelinate CNS axons
provide structural framework
Ependymal Cells
Line spine and brain to help with CSF distribution and monitor
Astrocytes
form scar tissue after injury
absorb and recycle neurotransmitters
regulate ion, nutrient, and dissolved gas concentrations
provide structural support;
Maintain blood-brain barrier;
