| Pipes |
| Conduits |
| Passages |
| Channels |
| Body tubes |
| Tear tubes |
| Passageways |
| Air conduits |
| Air passages |
| Hostile look |
| Air carriers? |
| Heat carriers |
| Tear channels |
| Tear carriers |
| Heating pipes |
| Fluid channels |
| Water conduits |
| Some have tears |
| Pipes for cables |
| Heating conduits |
| Sources of tears |
| Tear passageways |
| Ventilation pipes |
| Anatomical canals. |
| Some are for tears |
| Air passages, at times |
| Heating system network |
| Vas deferens and others |
| Where tears may be found |
| Ventilation system parts |
| There may be tears in them |
| Where some tears are found |
| Passageways for heat or air |
| ''Air'' and ''tear'' enders |
| Much of a central air system |
| They bring tears to one's eyes |
| Conduits for moving fluid or air |
| Part of a building's infrastructure |
| Air channels seen in a tense "Alien" scene |