1、肌体每平方英寸含1.9亿皮肤细胞

Every square inch of the human body has about 19 million skin cells.

2、每小时约有10亿人体细胞需要更新

 Every hour about 1 billion cells in the human body have to be replaced.

3、 平均每个人的头发数目为10万

The average human head has about 100,000 hairs.

4、由动脉、静脉和毛细血管组成的循环系统约有6万英里

The circulatory system of arteries, veins, and capillaries is about 60,000 miles long.

5、 平均一个人的一生心跳25亿次

The heart beats over 2.5 billion times in an average lifetime.

6、 每个人舌头表面、咽喉和上膛部位分布约有9千味蕾

There are about 9,000 taste buds on the surface of the tongue, in the throat, and on the roof of the mouth.

7、 人均每年眨眼次数为1千万次

Every person blinks over 10,000,000 times a year.

8、 人脑均重3英镑

The human brain weighs around 3 pounds.

9、 一个红血球游遍全身所需时间为20秒

It takes roughly 20 seconds for a red blood cell to circle the whole body.

10、 最强壮的肌肉是舌头

The strongest muscle in the body is the tongue.

11、心脏能够产生足够的压力，所产生的压强可以把血液喷出肌体30英尺

The heart creates enough pressure, which squirts the blood by 30 feet.

12、每个新生儿骨骼大约由300-350块骨骼组成，而每个成年人含有206块骨骼

A newborn baby’s skeleton consists of roughly 300 ~ 350 bones,while an adult human body consists of 206 bones

13、每个人含有600 肌肉

 There are 600 muscles in human body

14、每个人含有78个器官，其中22为内脏器官

The adult body is made up of 78 organs among which, 22 are internal organs

15、每个人有23对染色体，其中1对为性染色体

humans have 46 chromosomes, made up of 23 pairs，1pair is for sex determination