Question

multiple choice question
ventricles are ______ of the brain.
o fluid-filled cavities
o air-filled cavities
o inner layers of white matter
o superficial layers of gray matter

Explanation:

The ventricles of the brain are cavities that contain cerebrospinal fluid (CSF). They are not air - filled. The inner layers of white matter and superficial layers of gray matter refer to different tissue types in the brain (white matter is mainly composed of myelinated axons, and gray matter is composed of neuron cell bodies), not the ventricles.

Answer:

fluid - filled cavities