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  2. Cnidaria - Wikipedia

    en.wikipedia.org/wiki/Cnidaria

    Pacific sea nettles, Chrysaora fuscescens. Cnidaria (/ n ɪ ˈ d ɛər i ə, n aɪ-/ nih-DAIR-ee-ə, NY-) [4] is a phylum under kingdom Animalia containing over 11,000 species [5] of aquatic invertebrates found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites.

  3. Reniculate kidney - Wikipedia

    en.wikipedia.org/wiki/Reniculate_kidney

    The reniculate kidney is a multilobed kidney found in marine and aquatic mammals such as pinnipeds (seals, sea lions and walruses) and cetaceans (dolphins and whales) but absent in terrestrial mammals except bears. [1] Kidneys of this morphology have increased surface area for removing toxins from the body more efficiently than a non-lobed kidney.

  4. Germ layer - Wikipedia

    en.wikipedia.org/wiki/Germ_layer

    Some animals, like cnidarians, produce two germ layers (the ectoderm and endoderm) making them diploblastic. Other animals such as bilaterians produce a third layer (the mesoderm) between these two layers, making them triploblastic. Germ layers eventually give rise to all of an animal's tissues and organs through the process of organogenesis.

  5. Excretory system - Wikipedia

    en.wikipedia.org/wiki/Excretory_system

    The kidney's primary function is the elimination of waste from the bloodstream by production of urine. They perform several homeostatic functions such as:- Maintain volume of extracellular fluid; Maintain ionic balance in extracellular fluid; Maintain pH and osmotic concentration of the extracellular fluid.

  6. Nephridium - Wikipedia

    en.wikipedia.org/wiki/Nephridium

    The nephridium (pl.: nephridia) is an invertebrate organ, found in pairs and performing a function similar to the vertebrate kidneys (which originated from the chordate nephridia). Nephridia remove metabolic wastes from an animal's body.

  7. Coelenterata - Wikipedia

    en.wikipedia.org/wiki/Coelenterata

    Coelenterata is a term encompassing the animal phyla Cnidaria (corals, true jellies, sea anemones, sea pens, and their relatives) and Ctenophora (comb jellies). The name comes from Ancient Greek κοῖλος (koîlos) 'hollow' and ἔντερον (énteron) 'intestine', referring to the hollow body cavity common to these two phyla.

  8. Flame cell - Wikipedia

    en.wikipedia.org/wiki/Flame_cell

    Flame cells function like a kidney, removing waste materials. Bundles of flame cells are called protonephridia. [1] The flame cell has a nucleated cell body, with a "cup-shaped" projection, with flagella covering the inner surface of the cup. The beating of these flagella resemble a flame, giving the cell its name.

  9. Mammalian kidney - Wikipedia

    en.wikipedia.org/wiki/Mammalian_kidney

    The unipapillary kidney with a single renal pyramid is the simplest type of kidney in mammals, from which the more structurally complex kidneys are believed to have evolved. [17] [6] [18] Differences in kidney structure are the result of adaptations during evolution to variations in body mass and habitats (in particular, aridity) between species.