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  • and serving the function of excretion. Quite different from them are coelomoducts, developed from the middle layer outward, serving to release the germ...
    9 KB (1,017 words) - 19:14, 10 May 2023
  • Thumbnail for Oscar Werner Tiegs
    expectation that the progoneate genital ducts did not arise as is usual from coelomoducts in the embryo, but secondarily as epidermal ingrowths late in larval...
    42 KB (4,067 words) - 19:33, 6 July 2024