Across
- 4. a left and right half which is the division of the heart separated by a strong muscle wall
- 6. the two upper chambers that receive blood in the heart
- 7. the two lower chambers of the heart responsible for pumping blood out of the heart
- 8. the cells in blood that carry oxygen from the lungs to the body tissues and bring carbon dioxide back to the lungs for exhalation.
- 10. blood vessels that carry oxygenated blood away from the heart to various parts of the body
- 11. the sequence of events that occur in the heart from the beginning of one heartbeat to the next
- 12. it is the phase of the cardiac cycle during which the heart chambers contract to pump blood out
Down
- 1. tiny, thin-walled blood vessels that connect arteries and veins
- 2. integral components of the cardiovascular system
- 3. blood vessels that carry deoxygenated blood back to the heart
- 5. small, cell-like fragments in the blood that play a key role in blood clotting
- 9. the thin, smooth membrane lining the inner surface of the heart chambers