General physiology; an outline of the science of life . Fig. 74.—1. Division of the frogs egg. P, Pigmented surface of the egg ; pr, protoplasmic poled. pole rich in yolk ; sp, nuclear spindle. (After Hertwig.) //. Unequal division of the eggof a worm (Fabricia). A, Protoplasmic pole ; V, pole rich in yolk. (After Haeckel.) all known forms of cell-division can be conveniently classified underfour types— I. Total division. a. Equal division. b. Unequal division. c. Partial division. III. Multiple division. IV. Reducing division. In total division, the protoplasm of the daughter-ce
General physiology; an outline of the science of life . Fig. 74.—1. Division of the frogs egg. P, Pigmented surface of the egg ; pr, protoplasmic poled. pole rich in yolk ; sp, nuclear spindle. (After Hertwig.) //. Unequal division of the eggof a worm (Fabricia). A, Protoplasmic pole ; V, pole rich in yolk. (After Haeckel.) all known forms of cell-division can be conveniently classified underfour types— I. Total division. a. Equal division. b. Unequal division. c. Partial division. III. Multiple division. IV. Reducing division. In total division, the protoplasm of the daughter-cells is com-pletely divided by a partition, so that complete cells always resultfrom the division. But certain differences are here one case, that of equal division, the daughter-cells are entirelyequal, as in the type described above (Fig. 72, F). In anothercase, that of unequal division (Fig. 74), the two daughter-cells are o 2 196 GENERAL PHYSIOLOGY unequal in size and their contents differ; the larger one containsthe chief mass of
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