| Answer | Crossword Clue |
|---|---|
| heartbeats | A single pulsation of the heart |
| heartbeat | A single pulsation of the heart |
| heartbeat | a pulsation of the heart |
| heartbeats | HEARTBEAT, a pulsation of the heart |
| endothelia | The tissue that forms a single layer of cells lining various organs and cavities of the body, esp. the blood vessels, heart, and lymphatic vessels. It is formed from the embryonic mesoderm |
| endothelium | The tissue that forms a single layer of cells lining various organs and cavities of the body, esp. the blood vessels, heart, and lymphatic vessels. It is formed from the embryonic mesoderm |
