tentorium cerebelli - ANS-separates cerebrum from cerebellum
brain is ___% of total blood supply - ANS-20
arteries that feed the brain - ANS-internal carotid and vertebral arteries
blood leaves the brain through - ANS-internal jugular veins
blood-brain barrier function - ANS-protect brain from harmful substances
, cerebralspinal fluid definition - ANS-clear fluid composed mostly of H2O circulates
through brain ventricles and central canal of spinal cord
cerebralspinal fluid function - ANS-absorbs shock
protection
transport nutrients
excrete waste
ventricles of brain - ANS-lateral- 2 cerebral hemispheres
3rd- diencephalon
4th ventricle- brain stem and cerebellum
formation of CSF in ventricles - ANS-plasma drawn from choroid plexuses through
ependymal cells into ventricles
flow of CSF - ANS-lateral ventricles--> interventricular foramen
3rd ventricle--> cerebral aqueduct
4th ventricle--> subarachnoid space (brain) or central canal (spinal cord)
how is CSF reabsorbed into blood? - ANS-by arachnoid villi--> enters
sinuses-->dumped back into veinous blood--> jugular vein--> heart & lungs-->
capillaries
cranial nerves overview - ANS-12 pairs
part of peripheral nervous system
originate on inferior surface of brain
olfactory nerve function (I) - ANS-sensory, olfaction
trochlear nerves function (IV) - ANS-motor
superior oblique eye muscle
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