And since geckos can live for 6 to 10 years, they'll grow anywhere from 1,800 to 4,000 teeth in a lifetime! It's all thanks to a special type of cell in their gums, called stem cells. Stem cells ...

PRESENTER:'Every day, we humans, chomp and chew our way through all kinds of different foods ... Draw the different types of teeth, and label them to see how they're different.

What are the types of teeth? Find out the functions of different ... Find out how the heart keeps all the blood in your circulatory system flowing. What are medicines and drugs?

All sharks have teeth, but what may surprise you is that they ... And because they’re eating different foods, they need different types of teeth.’ Serrated teeth have a jagged edge - a bit like the ...