Application

Circulation

1. An accident victim has just been brought in to the emergency room.
The doctor says that he will need a transfusion of blood to save his life.
If the circulatory system is a closed system, what has happened that has
caused the victim to need blood?
3. Did you notice that the word “circulatory” sounds like the word
“circle”? Why do you think the circulatory system is like a circle?