Head hair grows longer than other hair because these follicles remain in an active growth (or anagen) phase longer than other other hair follicles—generally a couple of years instead of just a couple of months. … It’s called vellus hair, and it’s a safe bet that it’s an evolutionary relic.
Does head hair grow forever?
Hair does not necessarily stop growing when it reaches a specific length but it does once a certain period of time has passed (the cycle of your hair growth). The growth phase of hair is mostly determined by genetics and can last anywhere between two and six years.
What body part never stops growing?
Why our ears and noses never stop growing. While the rest of our body shrinks as we get older, our noses, earlobes and ear muscles keep getting bigger. That’s because they’re made mostly of cartilage cells, which divide more as we age.