Quiz 9 - CNS: last bit of brain Flashcards Preview

Anatomy > Quiz 9 - CNS: last bit of brain > Flashcards

Flashcards in Quiz 9 - CNS: last bit of brain Deck (10):
1

protection of the brain

brain is protected by bone, meninges and cerebrospinal fluid and the blood-brain barrier

2

mengiees

3 connective tissue membranes external to the CNS to cover and protect the CNS
- dura mater
- arachnoid
- pia mater

3

dura mater

"tough mother"; composed of 2 fibrous connective tissue layers

4

arachnoid

"spider"; beneath is subarachnoid space filled with CSF and large blood vessels - will protrude superiorly and allow CSF to be absorbed into venous blood

5

pia mater

"gentle mother"; delicate connective tissue that clings tightly to the brain

6

ventricles and cerebrospinal fluid

cavities of the brain filled with CSF contain choroid plexuses that produce CSF

7

ventricles

lateral - paired c-shaped
third - in diencephalon
forth - dorsal to pons

8

CSF

completely surrounds the exposed surfaces of the central nervous system

9

what does CSF do

- prevents contact between delicate neural surfaces
- support brain: forms a lipid cushion to give buoyancy to the CNS organs
- transport nutrients, chemical messengers and waste products

10

choroid plexus

produces CSF - also removes waste from CSF and fine-tunes its composition