anatomy lessons

[eman]

The 6th grade science teacher, Mrs. Parks asked her class "Which human body part increases to ten times its size when stimulated?"
No one answered until little Mary stood up and said, "you should not be asking sixth graders a question like that. I'm going to tell my parents and they will go tell the principal who will fire you."
Mrs. Parks ignored her and asked the question again. "Which body part increases to 10 times its size when stimulated?"
Little Mary's mouth fell open. Then she said to those around her "Boy is she going to be in big trouble."
The teacher continued to ignore her and said to the class, "Anybody?"
Finally Billy stood up, looked around nervously and said, "The body part that increases 10 times its size when stimulated is the pupil of the eye."
Mrs. Parks said, "Very good Billy" then turned to Mary and continued. "As for you young lady, I have three things to say. One, you have a dirty mind. Two, you didn't read your homework. And three, one day you are going to be very, very disappointed."