How can you tell if the hair is under a microscope? The hair shows a shaft and a follicle under a microscope. Again, the hair shaft shows three important features – cuticle, cortex, and medulla- that I have already described with the labeled diagrams.

Excerpt from my Normal Skin Histology video: https://kikoxp.com/posts/3660. Normal hair follicle histology (labeled image – low power): https://kikoxp.com/po...

Histology of hair follicles (longitudinal sections), sebaceous glands, eccrine glands, and arrector pili muscles in thin skin.

The combination of fluorescent microscope and molecular biology provides a great tool for biologists to study the growth of hair, especially the stem cells that resided inside the hair follicles. This knowledge may improve our success in treating hair loss due to aging or diseases.

Our hair grows from follicles located under the skin and has two main parts. Part of the hair that remains under the skin inside the follicle is referred to as the root while the part that protrudes to the surface (head, arms etc) is known as the shaft.