What are the two main divisions of the hair?

• A. Hair Follicle and Cortex
• B. Hair Shaft and Hair Root
• C. Hair Root and Hair Bulb
• D. Hair Shaft and Cortex

Answer: (B)

The main idea is that a hair strand has two primary parts: the part you can see above the skin, called the hair shaft, and the part that stays below the skin inside the follicle, called the hair root. The root includes the bulb at its base where hair growth occurs, while the shaft is the keratinized portion that you observe. The other options mix structures that aren’t the two primary divisions of the hair itself: the follicle is the skin structure that supports the hair, the cortex is a layer within the shaft, and the bulb is a feature of the root but not a separate division from the root.