What are the three phases of hair growth?

The three phases of hair growth are anagen, catagen, and telogen.

The anagen phase is the active growth phase of hair follicles, during which the hair is actively produced and can last for several years. This is the period where the hair cells divide rapidly, leading to the growth of the hair shaft. The length of the anagen phase can vary significantly among individuals and is influenced by genetics and other factors.

The catagen phase is a transitional stage that lasts for a few weeks, marking the end of the active growth of hair. During this phase, the hair follicle shrinks and detaches from the hair bulb. It represents a brief period where hair stops growing but does not fall out immediately.

The telogen phase is the resting phase, which can last several months. In this phase, the hair is still in the follicle but is not growing. After the telogen phase, the hair eventually falls out, and new hair begins to grow in its place, starting the cycle over again at the anagen phase.

The other options do not accurately represent the scientifically recognized phases of hair growth. They either use informal terminology or omit critical components of the hair growth cycle. The defined terminology of anagen, catagen,