| Answer | Crossword Clue |
|---|---|
| SLEEVING | Fitting with a tubular part. |
| MALE | Designed with a projecting part for fitting into a corresponding recessed part |
| lumenal | the cavity of a tubular organ or part the lumen of a blood vessel |
| lumens | the cavity of a tubular organ or part the lumen of a blood vessel |
| lumen | the cavity of a tubular organ or part the lumen of a blood vessel |
| sleeved | tubular part (as a hollow axle or a bushing) designed to fit over another part |
