1 Single breath of 100% O2. 2  During the following expiration, [N2] increases from 0% (pure dead space gas) to equilibrium (pure alveolar gas) (i.e. plateau). 3  Using [N2] vs. 4  graph, anatomical dead space is taken to be at the mid-point of the transition from conducting zone to gas exchange zone.
Best Black Garden Hose Holder wall mount-Durable , very powerful hanger it can hold 100ft heavy hose -keep your backyard neat and clean. Currently unavailable. We don't know when or if this item will be back in stock.
Pasadena Single Post Toilet Paper Holder in Tuscan Bronze is rated 4.4 out of 5 by 58. 1  Rated 5 out of 5 by JeffHyman from Price Pfister Toilet Paper Holder: Liked it a lot. Looks beautiful. 2  Rated 5 out of 5 by PA from I use this a hand towel holder!