. Fundamentals of botany. Botany. Io8 THE VEGETATIVE FUNCTIONS OF PLANTS 110. Stomata and Gaseous Exchange.—In Chapter IV we described the openings or stomata in the epidermis of leaves, through which water-vapor passed to the out- side. We also learned in Chapter VII that the inter- change of gases in photosynthesis takes place through the stomata. So, also, does the exchange of gases that. Fig. 70.—White birch {Betula popuUfolia). Portion of a branch showing the prominent lenticels. accompanies respiration. As the oxygen within the cells is consumed in respiration, more is absorbed from the
. Fundamentals of botany. Botany. Io8 THE VEGETATIVE FUNCTIONS OF PLANTS 110. Stomata and Gaseous Exchange.—In Chapter IV we described the openings or stomata in the epidermis of leaves, through which water-vapor passed to the out- side. We also learned in Chapter VII that the inter- change of gases in photosynthesis takes place through the stomata. So, also, does the exchange of gases that. Fig. 70.—White birch {Betula popuUfolia). Portion of a branch showing the prominent lenticels. accompanies respiration. As the oxygen within the cells is consumed in respiration, more is absorbed from the intercellular spaces. Thus its pressure becomes less within the leaf than without, and consequently oxygen enters by diffusion through the stomata. At the same time the air in the intercellular spaces becomes richer. 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 Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookauthorgag, bookcentury1900, bookdecade1910, booksubjectbotany
