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.
Young horses have 24 temporary teeth (called deciduous teeth). Adult female horses have 40 permanent teeth. Adult male horses have 42 permanent teeth (2 are canine teeth that the female does not have). It really depends on the horse; some have more than others.All horses have at least 36 teeth, but can have up to 44.oung horses have 24 temporary teeth (called deciduous teeth). Adult female horses have 40 permanent teeth. Adult male horses have 42 permanent teeth (2 are canine teeth that the female does not have). It really depends on the horse; some have more than others.