The Circulatory System!

Overview

Pop Quiz: The Circulatory System!

Question 1

True or false: Electrical impulses control the pumping of your heart.

Conclusion

That's true! Electrical signals generated by special cells in your heart trigger your heartbeat!

Question 2

Let's try another. If we measured them all, about how many miles of blood vessels are inside your body?

Choices

60, 600, 6,000, or 60,000 miles

Conclusion

There are about 60,000 miles of blood vessels in your body! That's enough to circle the Earth more than two times!

Question 3

True or false: The sound of your heart beating is made by blood rushing through your vessels.

Conclusion

False! That sound is made by the opening and closing of the valves in your heart! Did you get it?