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.
Durable for Large Liner Applications; Fabricated in One Piece Up To 200'x200' For land owners who are not able to hold water with just soil alone, plastic pond liners provide an excellent option for retaining water. The Pond GuyÂ® offers two types of Custom Size Pond Liner: RPE (Reinforced Polyethylene) and PVC (Poly Vinyl Chloride).