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Cells of animals and humans
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Microscope images of animal and human cells.
Animalia or Metazoa are eukaryotic organisms with more advanced abilities in comparison to Plantae. The kingdom Animalia can undergo metamorphosis, developing their multicellular body structure after birth to the levels of differentiation, when the cells start forming a very complex organism by means of specialized cells. Most of Metazoa is motile, able to move independently, and heterotrophic, surviving due to ingesting of other life forms. Animals, with the exception to Myxozoa are multicellular. Some can feed by photosynthesis (sponges) Apart from sponges and Placozoa, Animalia participants have separate body tissues like muscles and nerves. |
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Animals have specific cells which differentiate them by the presence of extracellular matrix build of collagen and flexible glycoproteins to be able to form skeleton. Unlike cells of plants, animal cells, having no cell walls can restructure and reorganize to construct multipart and composite forms. |
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