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.
The adult male horse has up to 44 permanent teeth, and a mare may have between 36-40 permanent teeth. Like humans, horses get two sets of teeth in their lifetime. The baby teeth, also known as deciduous teeth, are temporary.By age five, most horses will have their full set of permanent teeth.he adult male horse has up to 44 permanent teeth, and a mare may have between 36-40 permanent teeth. Like humans, horses get two sets of teeth in their lifetime. The baby teeth, also known as deciduous teeth, are temporary.