如果让你从上到下数一数人体有哪些器官,很少有人会首先想到头发,甚至大多数人并不认为它是一个器官。然而,头发的确是个器官,它是皮肤的附属器官。从胎儿在第三个月起,头发就开始生长了,在生命走向终极的时刻,头发已经轮回了二十代。每根头发的寿命大约是1400～1700天。 If you count the number of organs in your body from top to bottom, few will think of hair first, and most people do not even think of it as an organ. However, the hair is indeed an organ, it is an appendage to the skin. From the fetus in the third month, the hair began to grow, and the hair has been reincarnated for twenty generations at the point where life ends. The life of each hair is about 1400 ~ 1700 days.