Across
- 2. Opening in the heart that allows blood to flow either in or out
- 3. How many quarts of blood an adult heart pumps per minute
- 5. The upper chambers of the heart
- 6. The size of a child's heart
- 7. The fluid that flows through your heart
- 8. The wall of muscle that separates the left and right sides of the heart
Down
- 1. Blood is 78 percent _____
- 2. The lower chambers of the heart
- 4. The term used for when the heart contracts, pushing blood throughout the body