The elements of botany for The elements of botany for beginners and for schools elementsbotany00gray Year: 1887 ponding structure ; except that, owing to the great air-spaces of the interior, the fabric may be likened rather to a stack of chimneys than to a solid fabric. In young and partly transparent parts one may discern the cel- lular structure by looking down directly on the surface, as of a form- ing root. (Fig. 82, 441, 442). 402. The substance of which cell-walls are mainly composed is called Cellulose. It is essentially tiie same in the stem of a delicate leaf or petal and in the woo
The elements of botany for The elements of botany for beginners and for schools elementsbotany00gray Year: 1887 ponding structure ; except that, owing to the great air-spaces of the interior, the fabric may be likened rather to a stack of chimneys than to a solid fabric. In young and partly transparent parts one may discern the cel- lular structure by looking down directly on the surface, as of a form- ing root. (Fig. 82, 441, 442). 402. The substance of which cell-walls are mainly composed is called Cellulose. It is essentially tiie same in the stem of a delicate leaf or petal and in the wood of an Oak, except that in the latter the walls are Fig. 438. Diagram of a vegetable cell, such as it would be if when splierical it were equally pressed by similar surrounding cells in a heap. Fig. 439. Ideal construction of cellular tissue so formed, in section. Fig. 440. Magnified view of a portion of a transverse slice of stem of Calla Lily, The great spaces are tubular air-channels built up by the cells.
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