Fig. 1
From: Lung injury and inflammation response by chronic intermittent hypoxia in rats
Two planes and oxygen concentration change in the chamber. a Animal chamber is showed above. There are two planes and distribution of 10 points: the animals are placed in the plane 2; (b) The black curve represents plane one and the red curve represents plane two. Oxygen concentration in the chamber fluctuated between 6 and 7% to 20 and 21%