| 11. | The muscles surrounding the airways begin to swell, causing the air tubes to become narrower and making it difficult to breathe.
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| 12. | Stephens said, lifting the portable tank by its leather straps, the air tubes flowing under his shirt and into his nostrils.
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| 13. | The divers risked puncturing their pressure suits or air tubes if they ventured further into the tangle of broken equipment, officials said.
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| 14. | "You lay out a fabric panel, an air tube, or airbeam, and keep alternating, " said Todd Dalland of FTL / Happold.
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| 15. | Last year, a patient with lung disease complained to the Ombudsman after doctors had accidentally mixed up his air tubes in hospital.
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| 16. | Instead, Westneat discovered insects somehow squeeze the air tubes throughout their bodies to suck air in and out, much as lungs do.
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| 17. | The patch was then pressed on to the air tube and held until the rubber had cooled enough to make the attachment permanent.
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| 18. | Squamous cells line the larger, more shallow air tubes of the lung, and so are more vulnerable to smoke from high-tar, unfiltered cigarettes.
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| 19. | And officials now believe it is too dangerous to send divers into a field of small, jagged pieces that could cut their air tubes.
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| 20. | Virtual colonoscopy is much less invasive, with an air tube inserted an inch or two into the rectum so that the colon can be inflated.
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