. General physiology; an outline of the science of life. . Fio. 0.—Stentor Roeselii, a ti-umpet-shaped infusorian ; A, cut across at * ; 5 and C, the two pieces, whicli have become regenerated into complete Stentors. The clear extended mass in the Interior is the nucleus. well as a piece of the nucleus. This fact is of fundamental im- portance, and we shall have occasion to recall it frequently. In the present case it stands only apparently in contradiction with the idea of the cell as the elementary individual; for by the cutting- operation there are obtained, not new stages of individuality,
. General physiology; an outline of the science of life. . Fio. 0.—Stentor Roeselii, a ti-umpet-shaped infusorian ; A, cut across at * ; 5 and C, the two pieces, whicli have become regenerated into complete Stentors. The clear extended mass in the Interior is the nucleus. well as a piece of the nucleus. This fact is of fundamental im- portance, and we shall have occasion to recall it frequently. In the present case it stands only apparently in contradiction with the idea of the cell as the elementary individual; for by the cutting- operation there are obtained, not new stages of individuality, but complete Stentors, , individuals of the value of a cell. In all such divisions of cells, wherever protoplasm and nucleus are present in the pieces, the latter have the value of cells; in the process we do not go below the cell. If, however, the cut be made so that one piece contains protoplasm and nucleus, and the other only protoplasm, the former continues to live and represents a complete cell, while the latter, possessing no longer the individuality of a. 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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