Anatomy & Physiology › Section L · Anatomy of the nervous system › Topic L.3
Circulation and protection of the CNS
The brain is a small organ with an enormous appetite, sealed inside bone. It depends on a protected arterial supply, three layers of membrane and a circulating fluid that cushions it and carries away its wastes.
In this topic
- A demanding, protected organ
- Arteries and the cerebral arterial circle
- Venous drainage through dural sinuses
- The three meninges
- Spaces between the layers
- Ventricles and the route of CSF
- What CSF is and does
- Worked example: CSF turnover
- Worked example: blood flow to the brain
- When circulation fails
- Common mistakes to avoid
- Key takeaways
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