The medulla of the hair is primarily made up of what type of cells?

The medulla of the hair is primarily made up of round cells. This is significant because these cells contribute to the overall structure and strength of the hair. The medulla is the innermost layer of the hair shaft, and its round-shaped cells can influence the thickness and texture of the hair. It is usually present in thicker hair types and can be absent in finer hair. The rounded nature of these cells contrasts with other layers of the hair, such as the cortex, which is composed of elongated cells, and the cuticle, which features flat overlapping cells that protect the hair. Understanding the structure of the medulla is essential for hairstylists and cosmetologists when assessing hair types and treatments.