2. There are about 5 million hair follicles and more than 2 million sweat glands in human skin. Sebaceous glands can secrete 20 to 40 grams of sebum day and night.
3. The average life span of taste bud cells distributed on the tongue surface is 10.5 days.
Fingerprint is formed 6-8 weeks before the newborn is born.
5. There are more than 1000 trillion cells in an adult. The largest is the egg cell, which is about 200 microns in diameter.
6. There are about 654.38+ million white hairs, which are 0.35mm long every day. A healthy person will lose 30 to 40 hairs in 24 hours. If he is not alive, he will become bald in 10 years.