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.
How Many Calves. Three species of elephants exist: Asian elephant (Elephas maximus), African elephant (Loxodonta africana) and African forest elephant (Loxodonta cyclotis). Although they are very similar in many ways, they also have many differences, including size. But single calves are common all across the board.