archinephros
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archinephros — ▪ anatomy ancestral vertebrate kidney, retained by larvae of hagfish and of some caecilians and occurring in the embryos of higher animals. Two tubes, the archinephric, or Wolffian (Wolffian duct), ducts, extend between the body cavity and… … Universalium
excretion — excretion1 /ik skree sheuhn/, n. 1. the act of excreting. 2. the substance excreted, as urine or sweat, or certain plant products. [1595 1605; < LL excretion (s. of excretio) that which is sifted out. See EXCRETE, ION] excretion2 /ik skree… … Universalium
kidney — an organ of excretion and osmoregulation. See also nephridia, archinephros, pronephros and mesonephros … Dictionary of ichthyology
