Where is the hardest part of the human body?
Where is the hardest part of the human body?
Nyan~ The hardest part of the human body is the tooth enamel~ The enamel is very strong and firm~ 냥~♪
Where is the most vulnerable?
Nyan~ The most fragile part of the human body is probably the core of the eyeball~ The core is made of very thin and delicate tissue~ 냥~♪