Vitalism and scholasticism / by Bertram C.A. Windle.

  • Bertram Coghill Alan Windle
Date:
[1920?]
Catalogue details

Licence: In copyright

Credit: Vitalism and scholasticism / by Bertram C.A. Windle. Source: Wellcome Collection.

    64/264 (page 60)
    Balbiani nucleus get on without the cell, for it too perishes if it be cut off completely from it. It seems as if the cytoplasm, or cell-protoplasm in some way acts as a stimulant to the nuclear protoplasm and hence, though the nucleus is, or appears to be, the main factor in division, it is possible that the cytoplasm may 44 in- directly regulate the process of cleavage.”* Cytoplasm then is necessary to nucleus and nucleus to cytoplasm. If a unicellular organism be so divided up that certain of the fragments into which it is separated contain portions of the nucleus and certain do not, those fragments which contain bits of the nucleus will continue to live and what is more will gradually recon- struct themselves so that each of them will become a new organism. But not so the bits which have not been fortunate enough to secure a fragment of nuclear substance. As above stated these portions linger for a time with some of the signs of life but ultimately die. Hence we may conclude with Balbiani f that 44 the cellular life neither resides exclusively in the protoplasm [i.e., cytoplasm or cell-proto- plasm as opposed to nucleoplasm] nor within the nucleus, but results from the reciprocal * Morgan, The Development of the Frog’s Egg, p. 128. t Annales de Micrographie, 1893.