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The kidney of the frog is an opisthonephros. The kidneys are seen as two elongated, red organs in this image. The opisthonephros is the functional adult kidney in lampreys (cyclostomes), most fishes, and amphibians. [1] It is formed from the extended mesonephros along with tubules from the posterior nephric ridge. [2]
Italian tree frog, Hyla intermedia LC and: [n 1] Po's tree frog, Hyla perrini (southern Europe) [5] [6] Stripeless tree frog, Hyla meridionalis LC (southern Europe) Iberian tree frog, Hyla molleri (Iberian Peninsula, France) [2] Sardinian tree frog, Hyla sarda LC; Family: Ranidae (true frogs) Typical frogs. Common frog, Rana temporaria LC and ...
Wolffian tubules are labeled to the right. The mesonephros persists and forms the anterior portion of 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 ) begins to develop [ 2 ] during the sixth or seventh week.
The map of Biogeographical Regions therefore had to be expanded to cover all of Europe, not just the European Union. [7] Five more biogeographical regions were added: Anatolian, Arctic, Black Sea, Pannonian and Steppic. The revised Biogeographical Regions map for the Pan-European area was approved by the Standing Committee of the Bern ...
The European tree frog (Hyla arborea) is a small tree frog.As traditionally defined, it was found throughout much of Europe, Asia and northern Africa, [3] but based on molecular genetic and other data several populations formerly included in it are now recognized as separate species (for example, H. intermedia of Italy and nearby, H. molleri of the Iberian Peninsula, H. meridionalis of parts ...
Satellite image of Europe by night 1916 physical map of Europe Topography of Europe. Some geographical texts refer to a Eurasian continent given that Europe is not surrounded by sea and its southeastern border has always been variously defined for centuries. In terms of shape, Europe is a collection of connected peninsulas and nearby
Male Rana temporaria calling in a garden pond in Jambes, Belgium. The common frog or grass frog (Rana temporaria), also known as the European common frog, European common brown frog, European grass frog, European Holarctic true frog, European pond frog or European brown frog, is a semi-aquatic amphibian of the family Ranidae, found throughout much of Europe as far north as Scandinavia and as ...
The Italian agile frog (Rana latastei), also known as Lataste's frog, is a species of frog in the family Ranidae (true frogs). The species is native to southern Europe, primarily found in the Po River Basin of Italy. It is one of the most endangered amphibian species in Europe, with its populations declining sharply in recent years, and has ...