The stages of human hair growth

The thing I learned today is there are three stages of human hair growth, and they are named the anagen, catagen, and telogen phases.  The anagen phase is the growth phase.  The catagen phase is the transition phase that signals the end of growth.  The telogen phase is the resting phase; effluvium follows.  Here is a mnemonic: ACT. Anna is growing, cats just sit around not doing much, and you can tell this one is about to fall out.