| Clue | Source | Date |
|---|---|---|
| Where many blood cells are produced | The Washington Post | 14 Apr 2022 |
| Where many blood cells are produced | LA Times Daily | 14 Apr 2022 |
| Soft tissue on me thrown over into grave | The Telegraph Cryptic | 17 Feb 2019 |
| Tissue that produces blood cells | ||
| Red blood-cell source |