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.
1. Like humans, cats have two different sets of teeth. A set of 26 baby teeth, or deciduous teeth in veterinary terminology, start coming in between the ages of two and four weeks. Between the ages of three and four months, the adult teeth come in. When all is said and done, adult cats have 30 teeth.