. An introduction to vegetable physiology. Plant physiology. 32 VEGETABLE PHYSIOLOGY constructed, in which a quantity of air is slowly accumulated and into which the respiratory products can be discharged. Prom such reservoirs the oxygen which the cells require is obtained. The composition of the atmosphere in these chambers or lacunae is not accurately known, but it pro- bably differs somewhat from that of ordinary air. These air passages or reservoirs are very conspicuous in the stalks of floating leaves such as those of the water-lily, and in the submerged stems of most aquatic plants (fig.
. An introduction to vegetable physiology. Plant physiology. 32 VEGETABLE PHYSIOLOGY constructed, in which a quantity of air is slowly accumulated and into which the respiratory products can be discharged. Prom such reservoirs the oxygen which the cells require is obtained. The composition of the atmosphere in these chambers or lacunae is not accurately known, but it pro- bably differs somewhat from that of ordinary air. These air passages or reservoirs are very conspicuous in the stalks of floating leaves such as those of the water-lily, and in the submerged stems of most aquatic plants (fig. 34). A somewhat simi- lar mechanism is provided in the case of terrestrial plants. At the time of their first formation, all the cells are in close approximation to each other at all points of their surface. This condition is, however, only tempo-. Fig. 35. Cobtex op Root, showing Inter- cellular Passages between the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Green, J. Reynolds (Joseph Reynolds), 1848-1914. Philadelphia, P. Blakiston
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