Question

what is the function of the cuticle layer in hair?

Explanation:

The cuticle is the outermost layer of the hair. It acts as a protective barrier. Just like overlapping shingles on a roof protect a house, the cuticle's overlapping cells protect the inner layers of the hair (such as the cortex).

Answer:

Acts as a single layer of overlapping cells, like shingles on a roof.