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 typical adult horse has 12 premolars and 12 molars. They are oriented in a straight row, front to back, top and bottom, on each side of the mouth, with the 3 premolars in front of the 3 molars. With the two top rows, one row on each side, and the two bottom rows all of 6 each, we end up with 24 cheek teeth in all.So in the normal adult male horse we should have 24 cheek teeth (12 molars and 12 premolars), 4 canines, and 12 incisors for a total of 40 teeth.But that is not the whole story. How many teeth a given horse is influenced by his/her age. The canine teeth do not usually erupt until 4-6 years of age.he typical adult horse has 12 premolars and 12 molars. They are oriented in a straight row, front to back, top and bottom, on each side of the mouth, with the 3 premolars in front of the 3 molars. With the two top rows, one row on each side, and the two bottom rows all of 6 each, we end up with 24 cheek teeth in all.