. The cell in development and inheritance. Cells; Cells. GEOMETRICAL RELATIONS OF CLEAVAGE-FORMS 269 leads them to take up the position of least resistance or greatest economy of space. In this regard the behaviour of tissue-cells in general has been shown to conform on the whole to that of elastic spheres, such as soap-bubbles when massed together and free to move. Such bodies, as Plateau and Lamarle have shown, assume a polyhedral form and tend towards such an arrangement that the aira. , Fig. 121. — Cleavage o{ Polygordhts, from life. A. Four-cell stage, from above. B. Corresponding view of
. The cell in development and inheritance. Cells; Cells. GEOMETRICAL RELATIONS OF CLEAVAGE-FORMS 269 leads them to take up the position of least resistance or greatest economy of space. In this regard the behaviour of tissue-cells in general has been shown to conform on the whole to that of elastic spheres, such as soap-bubbles when massed together and free to move. Such bodies, as Plateau and Lamarle have shown, assume a polyhedral form and tend towards such an arrangement that the aira. , Fig. 121. — Cleavage o{ Polygordhts, from life. A. Four-cell stage, from above. B. Corresponding view of 8-cell stage, same (contrast Fig. 120, C). D. Sixteen-cell stage from the side. C. Side view of the of S7i7'face-contact between them is a ininiimnn. Spheres in a mass thus tend to assume the form of interlocking polyhedrons so arranged that three planes intersect in a line, while four lines and six planes meet at a point. If arranged in a single layer on an extended sur- face they assume the form of hexagonal prisms, three planes meeting along a line as before. Both these forms are commonly shown in the arrangement of the cells of plant and animal tissues; and Berthold. 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 Wilson, Edmund B. (Edmund Beecher), 1856-1939. New York : The Macmillan company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcells, bookyear1896
