The Major Regions of a Hair Shaft Include All of the Following

Question

The major regions of a hair shaft include all of the following except ________.
A) medulla
B) cuticle
C) external root sheath
D) cortex

Accepted Answer

The major regions of a hair shaft include the medulla, cuticle, cortex, and internal root sheath. The external root sheath is not a region of the hair shaft, but rather a component of the hair follicle.