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.
So, how many teeth do children have? Baby Teeth. Children begin teething around six months of age. The technical term for these early teeth is deciduous teeth, because they eventually fall out, just as leaves fall of from deciduous trees in autumn. Most people know these teeth as baby teeth, though they are also sometimes called milk teeth or primary teeth. In all, children have 20 baby teeth - 10 on the top and 10 on the bottom.