Ependymal cells line which structures?

Ependymal cells line which structures?

• A. Line the brain ventricles and the central canal of the spinal cord
• B. Line the meninges
• C. Line the choroid plexus
• D. Line the gray matter

Answer: (A)

Ependymal cells form the lining of the ventricular system, creating the ependyma that separates the CSF-filled cavities from the brain tissue. They line the brain ventricles (including the lateral, third, and fourth ventricles) and the central canal of the spinal cord. Their cilia help circulate CSF through these spaces, while microvilli can participate in modifying CSF as it passes. The choroid plexus inside the ventricles is a specialized structure associated with CSF production and is formed by these cells, but the primary lining of the ventricles and central canal is the ependymal layer.

Ependymal cells form the lining of the ventricular system, creating the ependyma that separates the CSF-filled cavities from the brain tissue. They line the brain ventricles (including the lateral, third, and fourth ventricles) and the central canal of the spinal cord. Their cilia help circulate CSF through these spaces, while microvilli can participate in modifying CSF as it passes. The choroid plexus inside the ventricles is a specialized structure associated with CSF production and is formed by these cells, but the primary lining of the ventricles and central canal is the ependymal layer.