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.
How many teeth do elephants have? Adult elephants have 24 teeth, but 26 if you count their tusks.  They have 12 molars and 12 premolars, and also 2 tusks    Elephants' teeth are very different from thoâ¦se of most other  mammals. Over their lives they usually have 28 teeth if you count  their first set of tusks. These are:     The two upper second incisors, known as tusks.