Ventricular System

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5 Terms

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🧠 Lateral Ventricles

  • Produce most of the cerebrospinal fluid (CSF) through the choroid plexus inside them.

  • Cushion and protect the brain from shocks

  • Help circulate nutrients and remove waste.

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🧠 3rd Ventricle

  • Acts as a central “relay station” for CSF moving from both lateral ventricles.

  • Surrounds important brain structures (like the thalamus & hypothalamus), so it 


  • also helps regulate fluid balance in this critical area. 

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🧠 Cerebral Aqueduct

  • Simply a conduit (narrow passage)—moves CSF from the 3rd to the 4th ventricle.

  • Clinically important: since it’s so narrow, it’s the most common site for blockages → can cause hydrocephalus (dangerous buildup of CSF).

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🧠 4th Ventricle

  • Channels CSF into two places:

  • Around the brain and spinal cord (through openings called foramina).

  • Down into the central canal of the spinal cord.

  • Protects the brainstem and cerebellum by cushioning them with fluid.

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🧠 Central Canal of the Spinal Cord

  • Carries CSF down the spinal cord.

  • Provides extra cushioning and protection for the spinal cord.

  • Helps distribute nutrients/waste along the cord (though in adults, it’s very tiny and may not circulate much fluid).Â