The harmful influence of the cell-theory upon morphology did not pass unnoticed by the broader-minded zoologists of the day.
The influence of the cell-theory on morphology was not altogether happy.
Schwann had therefore a good deal of exact knowledge to go upon in discussing the significance of the ovum for the cell-theory.
The comparison of cells with crystals was made in 1838 by the founders of the cell-theory, Schleiden and Schwann.
But the publication in 1839 of Schwann's cell-theory marks the rise of modern pathology.
Another argument against the teleological view is derived from the facts of the cell-theory.
Between the cell-theory on the one side, and physiology on the other, it was a wonder that morphology kept alive at all.