Students are assigned to dissect animals, usually frogs, earthworms, and other small animals, for the purpose of observing the anatomy of another "living" creature. By observing, first-hand, the central nervous system and vital organs of a frog, the student learns more about human anatomy, as there are similarities in the basic components of many complex living beings. By learning more about human anatomy, one can better understand both the complexities of the human body, and the fragility of life.
Whether students should be made to dissect frogs or any other animal species is highly debatable. Increasingly, school districts allow students to opt out of the procedure.
In short, a student can ask his or her teacher to be permitted to not take part in dissecting frogs.