Each tooth consists of a crown and a root. The surface of a tooth is covered with _enamel_, while the bulk of the tooth beneath is made of . The central cavity is called the cavity. A tooth is held tightly in its socket by a ligament.

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature