. General physiology; an outline of the science of life. . Fig. 67.— Stentor polymorphua. JV, Mouiliform nucleus ; o, mouth-openiug, cv, contractile vacuole. /. Young individual extended. 11. Older individual in the process of division, contracted. (After Stein.) living substance remains in constant connection with the original organism and helps to increase its volume; while in the latter case a part of the substance separates itself from the original organism, either, as in most cases, being set entirely free, or, as in the increase of tissue-cells, being separated merely by a partition-wall
. General physiology; an outline of the science of life. . Fig. 67.— Stentor polymorphua. JV, Mouiliform nucleus ; o, mouth-openiug, cv, contractile vacuole. /. Young individual extended. 11. Older individual in the process of division, contracted. (After Stein.) living substance remains in constant connection with the original organism and helps to increase its volume; while in the latter case a part of the substance separates itself from the original organism, either, as in most cases, being set entirely free, or, as in the increase of tissue-cells, being separated merely by a partition-wall and re- maining in place. Correspondingh', there is a large number of transitions between the growth, in the narrow sense, and the reproduction of the cell. Examples of such are afforded especially by many multinucleated cells, as, ;/., Ojoalinn ,\\\e infusorian living in the intestine of the frog, whicli at first is uninucleated and in growth becomes multinucleated by the repeated division of its nucleus. There occurs here a reproduction of the nuclei, while the. 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 Verworn, Max, 1863-1921; Lee, Frederic S. (Frederic Schiller), 1859-1939. London, Macmillan and co. , limited; New York, The Macmillan company
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