Question

skin appendages (part 2) review questions
what region of hair is the most heavily keratinized?
central medulla
cortex
cuticle

Explanation:

Hair has three main regions - central medulla, cortex, and cuticle. The cuticle is the outermost layer and is the most heavily keratinized, providing protection. The medulla is the innermost and cortex is in - between. Keratinization makes the structure tough and protective, and the cuticle has the highest degree of it among hair regions.

Answer:

C. cuticle