The central canal of the spinal cord contains what? A. White matter B. Gray matter C. Cerebrospinal fluid D. Spinal nerves

Step 1: Break Down the Problem

The question asks what substance is contained in the central canal of the spinal cord. It provides four options to choose from.

Step 2: Relevant Concepts

• The central canal of the spinal cord is known to be a narrow passage filled with a specific substance.
• The spinal cord consists of white matter and gray matter, but the central canal is distinct from these regions.

Step 3: Analysis and Detail

• White Matter: Composed mainly of myelinated axons and does not fill the central canal.
• Gray Matter: Refers to neuronal cell bodies and is located in the "H" shape in cross-sections of the spinal cord, not within the central canal itself.
• Cerebrospinal Fluid (CSF): This fluid circulates in the central canal, providing cushioning and nutrients to the spinal cord.
• Spinal Nerves: Are roots of the peripheral nervous system that branch out from the spinal cord; they do not reside in the central canal.

Step 4: Verify and Summarize

The central canal of the spinal cord is specifically known to contain cerebrospinal fluid.

Final Answer

C. Cerebrospinal fluid