Nephridiopore platyhelminthes


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    A meghatározás szó "Nephridium": 1. The evolution of nephridia encouraged tissue specialization by eliminating the need for all cells of an organism to be in contact with seawater for diffusion of metabolic wastes. Nephridia occur in two forms. The nephridiopore platyhelminthes, more primitive protonephridia, found in flatworms, ribbon worms and rotifers, are usually scattered among the other body cells.

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    More advanced, segmented invertebrates, such as earthworms, possess the more complex metanephridia, usually arranged nephridiopore platyhelminthes pairs. The protonephridium consists of a hollow cell located in the body cavity and a duct leading from it to an exterior opening, called a nephridiopore.

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    Fluid in the body cavity filters into the hollow cell, called a flame bulb or flame cell if it possesses cilia or a solenocyte if it has a flagellum. In either form, the cilia or the flagellum wave filtered urine down the tube to the nephridiopore platyhelminthes.

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    The metanephridium tubule lacks a flame cell and opens directly into the body cavity. Cilia lining the tubule draw up cavity fluids and conduct them to the exterior; tubule cells actively reabsorb useful nutrients as they pass. Analogous structures, the renette and the lateral nephridiopore platyhelminthes are characteristic of nematodes.

    nephridiopore platyhelminthes

    Kérjük, értékelje a meghatározását "Nephridium" Azt találtuk, hogy a következő kínai szavak és a fordítások, az "Nephridium": Sajnáljuk, a szó fordítását "Nephridium" nem található az adatbázisban.