| Answer | Crossword Clue |
|---|---|
| diverticula | A blind tube leading from a cavity or passage |
| diverticulum | A blind tube leading from a cavity or passage |
| fistulae | narrow passage or duct formed by disease or injury, as one leading from an abscess to a free surface, or from one cavity to another |
| fistula | narrow passage or duct formed by disease or injury, as one leading from an abscess to a free surface, or from one cavity to another |
| obturate | to close (a hole or cavity) so as to prevent a flow of gas through it, esp. the escape of explosive gas from a gun tube during firing |
| takeup | pipe or passage leading upward from below, as for conducting smoke or a current of air |
| uptake | pipe or passage leading upward from below, as for conducting smoke or a current of air |
