YOU SAID:

that is not normal for the human body to do

INTO JAPANESE

それは人体が行うのは正常ではありません

BACK INTO ENGLISH

It's not normal for the human body to do

INTO JAPANESE

人体がするのは正常ではありません

BACK INTO ENGLISH

What the human body does is not normal

INTO JAPANESE

人体がすることは正常ではありません

BACK INTO ENGLISH

What the human body does is not normal