The middle muscular layer of the uterus is the perimetrium

Which of the following statements best describes medical doctors?

A. They have hopes and dreams, feelings and fears, and frailties and flaws just like everyone else. B. Much of the time they're in a hurry and under a great deal of stress. C. Some of them literally hold life and death in their hands on a daily basis. D. One day a doctor may be friendly with workers, and the next day grumpy. E. All of the above

The center of ____________________ is the centroid of the pressure distribution on a planar surface.

Fill in the blank(s) with the appropriate word(s).