| Answer | Crossword Clue |
|---|---|
| heartbeats | HEARTBEAT, a pulsation of the heart |
| heartbeat | a pulsation of the heart |
| heartbeats | A single pulsation of the heart |
| heartbeat | A single pulsation of the heart |
| sinoatrial | as in sinoatrial node, a small mass of tissue embedded in the right atrium of the heart, that regulates the heartbeat |
| heartbeat | The pulsation of the heart |
| heartbeats | The pulsation of the heart |
