What channels connect the lateral ventricles with the third ventricle?

• A. Foramen of Monro
• B. Lateral Ventricles
• C. Choroid Plexus Structures
• D. Falx Cerebri

Answer: (A)

The concept being tested is how CSF moves between the ventricular chambers of the brain. The passage that directly connects each lateral ventricle to the third ventricle is the Foramen of Monro (interventricular foramen). There are two of these openings, one for each lateral ventricle, and they allow CSF produced in the lateral ventricles to flow into the third ventricle before continuing down the ventricular system.

In contrast, the lateral ventricles themselves are the chambers, not the connecting channels; the choroid plexus structures produce CSF inside the ventricles but do not serve as the passage between ventricles; and the falx cerebri is a dural fold that separates the cerebral hemispheres, not a CSF conduit.