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Ventricles
Squeeze
together
Send blood to
Lother parts of the
body
Atrium
The valves between the
ventricles and blood
vessels snapping shut.
1. In the heart, what opens and closes to allow the blood to flow?
2. What are the two upper chambers of the heart called?
3. What are the two lower chambers of the heart called?
4. Which part of the heart receives blood?
Atria
Valves
Atria
Ventricles
answer.
Less than I
second
5. What do the ventricles do?
6. After the atria fills with blood, which part is next to receive blood?
7. What does contract mean?
8. What creates the second part of our heartbeat sound?
9. How quickly does it take for our hearts to beat?