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.
Along with the original DaVinci vape, this is probably the most rugged, durable and shock resistant portable vaporizers on the planet. Overall both the Mighty and the smaller version the Crafty are fantastic and produce some of the cleanest, most potent vapor of any portable vape.