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endodermEntoderm (ger.)

  • The inner layer of the blastoderm. (OED)
    All the hydroid zoophytes can be proved to consist essentially of two distinct membranes; to the external of these membranes I shall give the name of ectoderm, and to the internal that of endoderm.
    Allman, G.J. (1853).On the anatomy and physiology of Cordylophora, a contribution to our knowledge of the Tubularian zoophytes. Philos. Trans. Roy. Soc. Lond. 367-384: 368.
    More minutely examined, the body of the Hydra is found to be composed of two membranes, an ectoderm and an endoderm.
    Greene, J.R. (1861). Manual of the Animal Kingdom. A Manual of the Sub-Kingdom Coelenterata: 21; cf. ibid. 11.

    Aus dem inneren oder vegetativen Keimblatt, dem Entoderm, entsteht das ernährende Epithelium des Canalsystems und die Fortpflanzungsorgane. Aus dem äusseren oder animalen Keimblatt, dem Ectoderm, entstehen alle übrigen Theile.

    Haeckel, E. (1870). Ueber den Organismus der Schwämme und ihre Verwandtschaft mit den Corallen. Jenaische Zeitschrift für Medicin and Naturwissenschaft 5, 207-235: 212.

    The wall of the sac [of hydrozoa] is composed of two cellular membranes, the outer of which is termed the ectoderm, and the former the endoderm, the former having the morphological value of the epidermis of the higher animals and the latter that of the epithelium of the alimentary canal.
    Huxley, T.H. (1877). A Manual of the Anatomy of Invertebrated Animals: 110 (germ. 1878: 47).