Wolffia

NOUN
  1. minute rootless aquatic herbs having globular fronds floating on or near the water surface and bearing one flower per frond
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How To Use Wolffia In A Sentence

  • Again, as Mr. Darwin says, "In the embryos of all air-breathing vertebrates, certain glands, called the corpora Wolffiana, correspond with and act like the kidneys of mature fishes;" and during the sixth month the whole body is covered very thickly with wool-like hair -- even the forehead and ears being closely coated; but it is, as Mr. Darwin observes, "a significant fact that the palms of the hands and the soles of the feet are quite naked, like the inferior surfaces of all four extremities in most of the lower animals," including monkeys. The Scientific Evidences of Organic Evolution
  • The seminiferous tubules become connected with outgrowths from the Wolffian body, which, as before mentioned, form the efferent ducts of the testis. XI. Splanchnology. 3. The Urogenital Apparatus
  • The vesico-urethral portion absorbs the ends of the Wolffian ducts and the associated ends of the renal diverticula, and these give rise to the trigone of the bladder and part of the prostatic urethra. XI. Splanchnology. 3. The Urogenital Apparatus
  • The antinomy is the conflict inherent in the “cosmological idea” of the world as a whole; looked at historically, it is the conflict between opposing theories in rational cosmology (one of the four divisions of metaphysics in the Leibniz-Wolffian system then current in Germany). ANTINOMY OF PURE REASON
  • The tubules of the metanephros, unlike those of the pronephros and mesonephros, do not open into the Wolffian duct. XI. Splanchnology. 3. The Urogenital Apparatus
  • The pronephros disappears very early; the structural elements of the mesonephros mostly degenerate, but in their place is developed the genital gland in association with which the Wolffian duct remains as the duct of the male genital gland, the Müllerian as that of the female; some of the tubules of the metanephros form part of the permanent kidney. XI. Splanchnology. 3. The Urogenital Apparatus
  • Each arises on the lateral aspect of the corresponding Wolffian duct as a tubular invagination of the cells lining the celom (Fig. 1106). XI. Splanchnology. 3. The Urogenital Apparatus
  • In all the Gnathostomes the Wolffian duct is converted into the spermaduct, and the Mullerian duct into the oviduct. The Evolution of Man — Volume 2
  • Where women need none, men need two kinds of hormones: androgens from the testes to prompt the Wolffian duct into development, and a second substance, called Mullerian inhibiting hormone, to suppress the Mullerian duct and defeminize the male fetus. Homosexuality and Biology
  • In females, in the absence of the testes, the Müllerian ducts develop into the oviducts, which transport eggs from the ovaries to the uterus, while the Wolffian ducts degenerate.
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