Question

multiple choice question
which term refers to the region of loosely arranged cells and air spaces at the center of the hair?

follicle
cortex
cuticle
medulla

Explanation:

• The follicle is the structure that anchors hair in the skin, not the inner hair region.
• The cortex is the thick middle layer of hair made of tightly packed keratin cells, not loose cells/air spaces.
• The cuticle is the outer protective layer of hair, composed of overlapping scale-like cells.
• The medulla is the innermost region of hair, consisting of loosely arranged cells and air spaces.

Answer:

medulla