cerebral circulation
circle of willis
is to ensure a constant supply of nutrient rich blood to brain tissue
if damage occurs in one area,then blood supply can be maintained through an alternate route
formation of CSF
produced from plasma in the plexuses in the ventricles of the brain . The choroid plexus consists of ependymal cell and blood capillaries
function of CSF: Mechanical protection
protects and cushions brain and spinal cord-stops them from being crushed under their own weight
function of CSF:Circulation
allows exchange of nutrient and waste between blood and nervous tissue
function of CSF: Homeostatic
pH of CSF affects pulmonary ventilation and cerebral blood flow
circulates hormones
circulation of CSF
Primarily produced in lateral ventricles,circulates through 3rd and 4th venticles,around subarachnoid space reabsorbed through arachnoid villi in dural sinuess
nerve plexus
is a network of converging and diverging nerve fibers