. The plant cell, its modifications and vital processes; a manual for students. Plant physiology; Plant anatomy; Plant cells and tissues. 20 THK PLANT CELL. make up for any deficiency in strength of the epidermis (see Figs. 8 and 10). In surface view epidermal cells present a variet)' of stiapes; thus they may be rectangular, polyhedral, or sinuous in contour (see Fig. 11). In all cases, however, a regular pattern is preserved, the component cells fitting close so as to leave no intercellular spaces, except vchere stomata occur. In section, some epidermal cells may show minute perforations or
. The plant cell, its modifications and vital processes; a manual for students. Plant physiology; Plant anatomy; Plant cells and tissues. 20 THK PLANT CELL. make up for any deficiency in strength of the epidermis (see Figs. 8 and 10). In surface view epidermal cells present a variet)' of stiapes; thus they may be rectangular, polyhedral, or sinuous in contour (see Fig. 11). In all cases, however, a regular pattern is preserved, the component cells fitting close so as to leave no intercellular spaces, except vchere stomata occur. In section, some epidermal cells may show minute perforations or " pits " in their inner walls. These pits have been functional in permitting of the passage of the protoplasm from the epidermis into the deeper cells just internal to it when the work of the li-sing substance has been completed; they may be seen in the epidermal cells of :. Fig. II.—Epidermal Cells hf Seitnni, seen in surface view. Note.—Epidermis maybe studied in any of tlie higher plants. Great thickening of the outer wall may be seen in the epidermal cells of the Holly leaf, and of Vi«cum album, leaf of Piniis sylveslris, and Ficus elastica. The cuticle may be caused to separate by the use of'caustic potash ; and by the use of Schulze's solution, the part of the wall which still remains unaltered cellulose may be distinguished from the rest. 2. Structures to be observed in connection with the Epidermis. These are:— (a) Stomata (occurring in leaves, petioles, petals, and some stems). (b) Hairs, of varied shape, size, and function. (a) Stomata are apertures or intercellular spaces occurrini' at certain points in the epidermis, which permit of the passage of the gases of the atmosphere into spaces surrounded by tha. 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 Haig, Harold Axel. L
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplantanatomy, bookyea
