Question

question 28
the large fluid - filled spaces within the brain are called the
meninges.
sulci.
gyri.
ventricles.

Explanation:

• Meninges: These are the protective membranes (dura mater, arachnoid mater, pia mater) covering the brain and spinal cord, not fluid - filled spaces.
• Sulci: These are the grooves or fissures on the surface of the brain, which help in increasing the surface area. They are not large fluid - filled spaces.
• Gyri: These are the ridges or convolutions on the surface of the brain, which also contribute to increasing the surface area. They are not fluid - filled spaces.
• Ventricles: The brain has four ventricles (two lateral ventricles, third ventricle, fourth ventricle) that are large fluid - filled spaces. The ventricles produce and circulate cerebrospinal fluid.

Answer:

ventricles.