Enamel, it is the hardest substance in the human body.
fluoride
Beavers have a hard protective coating on their teeth that contains iron. This turns their teeth orange and makes them extra hard.
Fortunately for us the enamel coating our teeth is exceedingly strong
The key element is calcium.
Because beavers need their teeth to chew in logs to make a river dam or to just eat. I suppose they could eat with small teeth, but it would take them hours and hours to eat just a stump of a branch. Sorry Prettydoll27
Mycobacterium tuberculosis does not hide; it simply has a coating that makes it hard to detect. This waxy coating on its cell surface makes the cell impervious to gram staining.
The muscles in your jaw move your teeth, creating "chewing", and there is something called "enamel" which makes your teeth so hard so they can chew.
argon :)
enamel
because an egg shell doesn't have a hard coating like most other shells because an egg shell doesn't have a hard coating like most other shells
because an egg shell doesn't have a hard coating like most other shells because an egg shell doesn't have a hard coating like most other shells
boh
Bones have a hard coating to protect the nerves, marrow and blood vessels located in the cavity,