The term "vent" can refer to multiple distinct structures depending on whether the context involves mechanical engineering, home architecture, or anatomy. In residential construction and HVAC systems, ventilation openings are often called registers, grilles, air diffusers, or exhaust flues. In plumbing, they are designated as vent stacks or plumbing air admittance valves. In biology and oceanography, hydrothermal vents on the ocean floor are known as black smokers, while biological respiratory openings in animals are called spiracles or blowholes.
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