. Biology . lls distributedamong absorbing cells of the gutepithelium (Fig. 56). In preparedsections, they may be distinctly madeout, if filled with granules whichhave an albuminous nature, but ifemptied of granules, they become sosmall and compressed that they are diflicult to find. The absorption cells are columnar, ciliated, epitheHal cells,somewhat broader at the ciliated end. In each there is atypical and characteristic closing apparatus. The free sur-face possesses a cuticle-like covering w^hich bears a hedge offine, stiff rods, through which the ciHa pass from their basalbodies in the c
. Biology . lls distributedamong absorbing cells of the gutepithelium (Fig. 56). In preparedsections, they may be distinctly madeout, if filled with granules whichhave an albuminous nature, but ifemptied of granules, they become sosmall and compressed that they are diflicult to find. The absorption cells are columnar, ciliated, epitheHal cells,somewhat broader at the ciliated end. In each there is atypical and characteristic closing apparatus. The free sur-face possesses a cuticle-like covering w^hich bears a hedge offine, stiff rods, through which the ciHa pass from their basalbodies in the cell to the lumen of the gut. These ciHa areabsent on the cells of the typhlosole, where fat absorption is thechief role (Greenwood). The function of the minute rods is un-known but they occur very generally on absorption of absorbed food-stuffs are often visible in these cells,some of which may be recognized. Thus, if powdered carmineor indigo is mixed with the worms food, the colored granules. Fig. 56.—Cells from the en-doderm of a worm shomngenlarged gland cells with se-cretions, and between them,the absorptive cells. (FromK. C. Schneider.) SYSTEM OF THE EARTHWORM 143
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectbiology
