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首页> 外文期刊>cell and tissue research >Light and electron microscopic studies on the excretory system ofMacrobiotus richtersiMurray, 1911 (Eutardigrada)
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Light and electron microscopic studies on the excretory system ofMacrobiotus richtersiMurray, 1911 (Eutardigrada)

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The excretory system ofMacrobiotus richtersiconsists of one dorsal and two lateral components and shows a high degree of structural complexity. In each of these a tricellular external lobe and a column can be distinguished, the two parts being connected distally. The surface of the lobe cells is increased by deep basal infoldings and fingerlike processes which form a labyrinth next to the basal lamina. Their cytoplasm contains numerous mitochondria, a well developed rough endoplasmic reticulum, dictyosomes, and granules in amounts depending on the physiological state of the animal. Excretory crystals occur in caveolae located in the lobe: between the fingershaped processes of the cell and in the space enclosed by the basal lamina on one side and the column on the other.

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