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  2. Kidney development - Wikipedia

    en.wikipedia.org/wiki/Kidney_development

    The development of the kidney proceeds through a series of successive phases, each marked by the development of a more advanced kidney: the archinephros, pronephros, mesonephros, and metanephros. [1] The pronephros is the most immature form of kidney, while the metanephros is most developed. The metanephros persists as the definitive adult kidney.

  3. Kidney - Wikipedia

    en.wikipedia.org/wiki/Kidney

    In humans, the kidneys are two reddish-brown bean-shaped blood-filtering organs [1] that are a multilobar, multipapillary form of mammalian kidneys, usually without signs of external lobulation. [ 2 ] [ 3 ] They are located on the left and right in the retroperitoneal space , and in adult humans are about 12 centimetres ( 4 + 1 ⁄ 2 inches) in ...

  4. Development of the urinary system - Wikipedia

    en.wikipedia.org/wiki/Development_of_the_urinary...

    The mesonephros persists and form the permanent kidneys in fish and amphibians, but in reptiles, birds, and mammals, it atrophies and for the most part disappears rapidly as the permanent kidney (metanephros) develops beginning during the sixth or seventh week, so that by the beginning of the fifth month only the ducts and a few of the tubules ...

  5. Scientists take ‘pioneering steps’ toward growing human ...

    www.aol.com/scientists-pioneering-steps-toward...

    Scientists have grown kidneys containing mostly human cells inside pig embryos, an important step toward growing kidneys and potentially other human organs.

  6. Mammalian kidney - Wikipedia

    en.wikipedia.org/wiki/Mammalian_kidney

    Bovine kidneys also lack renal pelvis, urine from the major calyces is excreted directly into the ureter. [87] Kidneys can be unipapillary, [14] as in rats and mice, [88] with few renal papillae, as in spider monkeys, or with many, as in pigs and humans. [14] Most animals have single renal papilla. [14]

  7. Kidney (vertebrates) - Wikipedia

    en.wikipedia.org/wiki/Kidney_(vertebrates)

    Unlike mammals, the kidneys of reptiles do not have a clear distinction between cortex and medulla. [43] The kidneys lack the loop of Henle, have fewer nephrons (from about 3,000 to 30,000), and cannot produce hypertonic urine. [3] [21] Nitrogenous waste products excreted by the kidneys may include uric acid, urea and ammonia. [55]

  8. Cuban tree frogs will grow to the size of a human hand, eat ...

    www.aol.com/cuban-tree-frogs-grow-size-090121180...

    A Cuban tree frog explored in Lake Worth, Florida in 2010. According to the University of Florida, the frogs are an invasive species.

  9. Poikilotherm - Wikipedia

    en.wikipedia.org/wiki/Poikilotherm

    The common frog is a poikilotherm and is able to function over a wide range of body core temperatures. A poikilotherm (/ ˈ p ɔɪ k ə l ə ˌ θ ɜːr m, p ɔɪ ˈ k ɪ l ə ˌ θ ɜːr m /) is an animal (Greek poikilos – 'various', 'spotted', and therme – 'heat') whose internal temperature varies considerably.