General physiology; an outline of the science of life . Pig. 133.—Stentor rocselii, a ciliate-infusorian cell. The clear, extended, rod-shaped mass in theinterior is the nucleus. A, Cut into two nucleated pieces at * ; at B and (7the nucleated pieceshave become regenerated into whole Stentors and continue to live. tion it still performs such movements as the whole Amoebaperforms. The external vital conditions, moreover, are allfulfilled, for the part exists in the same medium and has the sameexternal relations as the whole Amoeba. Nevertheless, it lasts fora short time only, it soon dies and c
General physiology; an outline of the science of life . Pig. 133.—Stentor rocselii, a ciliate-infusorian cell. The clear, extended, rod-shaped mass in theinterior is the nucleus. A, Cut into two nucleated pieces at * ; at B and (7the nucleated pieceshave become regenerated into whole Stentors and continue to live. tion it still performs such movements as the whole Amoebaperforms. The external vital conditions, moreover, are allfulfilled, for the part exists in the same medium and has the sameexternal relations as the whole Amoeba. Nevertheless, it lasts fora short time only, it soon dies and cannot be restored to life byany agency. Every like experiment without exception upon anyother cell yields the same result (Fig. 133). In all such casesa certain mass of living substance exists in a medium in which allexternal vital conditions are fulfilled, and yet the mass cannotcontinue living. Hence some factor among the general conditionsof life is wanting. 296 GENERAL PHYSIOLOGY Inasmuch as there exists upon the earth at present no livingsubsta
Size: 1027px × 2432px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidgen, booksubjectphysiology
