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(See text). lens epithelium % surface is thrown into folds, called ciliary processes,
the whole being covered by the ciliary epithelium, which is a double layer of cells;
the layer next to the vitreous body (see below), called the inner layer, ...
Some gemmae are formed upon specialized cells (sterigmata) and are spindle
shaped or more or less ovoid. Others occur as chains of cells. Sexual
reproduction. The sex organs of ferns are differentiated. The sperm-producing
simple glands (unbranched, one- to several-celled hairs with a headlike cluster of
secretory terminal cells); simple (unbranched), nonglandular hairs; dendroid
hairs (branching filaments); and scales (flat cell plates) of many patterns. Scales ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review