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.
Cups are very plain, both above and below, with little wear appearing on them. Horses have two sets of teeth, one temporary and one permanent. Temporary teeth may also be called baby or milk teeth.. Temporary incisors tend to erupt in pairs at 8 days, 8 weeks, and 8 months of age.