General physiology; an outline of the science of life . Fig. 206.—Form of the nucleus in secreting-cells. /, Double cells with two nuclei from the egg-follicles of Nepa einerea. Between the two nuclei a mass of chitin is being secreted for theformation of an egg-ray ; the nuclei have extended pseudopodia toward this side, so that thesecreted (granular) mass is circularly enclosed by the nuclear pseudopodia. //, Secreting-cellsfrom the spinning-glands of caterpillars. (After Korschelt.) sorbed; the micronucleus grows by the ingestion of substance,differentiates, divides, and gives rise to a new
General physiology; an outline of the science of life . Fig. 206.—Form of the nucleus in secreting-cells. /, Double cells with two nuclei from the egg-follicles of Nepa einerea. Between the two nuclei a mass of chitin is being secreted for theformation of an egg-ray ; the nuclei have extended pseudopodia toward this side, so that thesecreted (granular) mass is circularly enclosed by the nuclear pseudopodia. //, Secreting-cellsfrom the spinning-glands of caterpillars. (After Korschelt.) sorbed; the micronucleus grows by the ingestion of substance,differentiates, divides, and gives rise to a new micronucleus and a - */ &{*: ?*n*i*5 ^i%;. Fig. 257.—Cells of salivary glands. .4, At rest. The nuclei are star-shaped. B, After stimulationof the gland. The nuclei are round. (After Heidenhain.) new macronucleus, which undergo a very considerable increase in size. It is unnecessary to extend still farther the enumeration of facts. 1 Cf. p. 201. 518 GENERAL PHYSIOLOGY From the experiments and observations presented it is evidentthat between
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Keywords: ., bookcentury1800, bookdecade1890, bookidgen, booksubjectphysiology
