What is the lowest part of the hair strand known as?

The lowest part of the hair strand is referred to as the hair bulb. This structure is crucial because it is located at the base of the hair follicle, where the cells divide and grow to form the hair shaft. The hair bulb contains the essential living cells that contribute to hair development, and it is also where the hair's pigment is produced.

Understanding the hair bulb's role can also help you appreciate the overall hair growth cycle, as it is involved in the anagen (growth), catagen (transitional), and telogen (resting) phases of hair growth. This anatomical knowledge is beneficial for anyone in the cosmetology field, as it can influence techniques for hair care and treatments.