But fortunately for most of us, the immune system is constantly on duty to battle germs that could make us ill. The following discussion questions and activities will help your students learn about how the immune system protects them from germs and illness.
Elephants however, go through six sets of 9lb teeth during their lifetimes, with new teeth growing in to replace old ones that have worn out. An elephants starts with two front teeth that fall out after about a year and are replaced by a set of tusks.
What Animal Has Two Sets of Teeth? The tuatara has two sets of teeth in his upper jaw that he uses to slice his food rather than grind or chop it. His dual upper teeth are among many intriguing characteristics of this rare New Zealand reptile, which make him a popular subject of scientific study.