Question

cross-sectional anatomy of the spinal cord
in the spinal cord, nerve tracts or funiculi make up what?
white columns
central canal
gray commissure
gray horns

Explanation:

In the spinal cord, nerve tracts (funiculi) are composed of myelinated axons. Myelinated axons give a white appearance (due to myelin's lipid content), and these tracts form the white columns (funiculi). The central canal is a cerebro - spinal fluid - filled space. The gray commissure connects the two sides of the gray matter. Gray horns are parts of the gray matter (unmyelinated cell bodies, dendrites, etc.).

Answer:

White columns