Lab 12: Cerebrospinal Fluid

Cerebrospinal fluid, CSF

Clear fluid that surrounds the brain and spinal cord, cushions the CNS, provides buoyancy, maintains the chemical environment, and removes waste.

Brain, spinal cord

What is in the CENTRAL NERVOUS SYSTEM (CNS)?

Cushions CNS, buoyancy, maintains chemical environment, circulates nutrients, remove waste

What does CEREBROSPINAL FLUID do?

Choroid plexus

Produces CSF.

CP → LV → IF → 3V → AQ → 4V → Apertures → SAS → AV → DVS

(1/10)

Lateral ventricles

First ventricles containing CSF.

CP → LV → IF → 3V → AQ → 4V → Apertures → SAS → AV → DVS

(2/10)

Interventricular foramen

Connects lateral ventricles to the third ventricle.

CP → LV → IF → 3V → AQ → 4V → Apertures → SAS → AV → DVS

(3/10)

Third ventricle

Middle ventricle in the diencephalon.

CP → LV → IF → 3V → AQ → 4V → Apertures → SAS → AV → DVS

(4/10)

Cerebral aqueduct

Connects the third and fourth ventricles.

CP → LV → IF → 3V → AQ → 4V → Apertures → SAS → AV → DVS

(5/10)

Fourth ventricle

Last ventricle before CSF exits.

CP → LV → IF → 3V → AQ → 4V → Apertures → SAS → AV → DVS

(6/10)

Median apertures, lateral apertures

Allow CSF to leave the fourth ventricle.

CP → LV → IF → 3V → AQ → 4V → Apertures → SAS → AV → DVS

(7/10)

Subarachnoid space

CSF circulates around the brain and spinal cord.

CP → LV → IF → 3V → AQ → 4V → Apertures → SAS → AV → DVS

(8/10)

Arachnoid villi

Reabsorb CSF into venous blood.

CP → LV → IF → 3V → AQ → 4V → Apertures → SAS → AV → DVS

(9/10)

Dural venous sinus

Returns CSF to the bloodstream.

CP → LV → IF → 3V → AQ → 4V → Apertures → SAS → AV → DVS

(10/10)