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  1. Agreeably with this idea, Oken contended that there are only five animal classes: (1) the Dermatozoa, or invertebrates; (2) the Glossozoa, or Fishes, as being those animals in which a true tongue makes, for the first time, its appearance; (3) the Rhinozoa, or Reptiles, wherein the nose opens for the first time into the mouth and inhales air; (4) …

  2. Sep 1, 2010 · This paper then examines the major criticisms that have been waged against cell theory, and argues that these too can be interpreted through the prism of biological atomism as attempts to...

  3. May 18, 2017 · Oken's account of living beings starts with the primordial units of life, the ‘Infusoria’, and then reconstructs the emergence of all animal classes, which are formed by the addition and reduplication of successively more complex organs. This culminates in human beings, who possess all organs in their higher form.

  4. Feb 1, 2002 · In the 1830s and 1840s, Unger was a pioneer of cell theory. His publications, including his university textbooks, are characterized by a particulate and quantifying approach towards vital phenomena.

  5. An adherent of Schelling’s natural philosophy, Oken regarded the diversity of living organisms as the result of the development and transformation of a certain ideal creative primary element. According to Oken, each stage in the development of organic forms embodies a predetermined ideal primary form.

  6. As Lorenz Oken he published in 1802 his small work entitled Grundriss der Naturphilosophie, der Theorie der Sinne, und der darauf gegründeten Classification der Thiere, the first of the series of works which placed him at the head of the “natur-philosophie” or physio-philosophical school of Germany.

  7. May 8, 2019 · Parts of Cell Theory: More than 300 years ago, no knowledge existed about the fundamental unit of living things.The invention of the microscope and results of observational studies that followed resulted in a plethora of information that proved that all living things are made up of millions of tiny fundamental units that are vital to life itself.

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