Transmission electron micrograph (TEM) showing the apical region of a cell of a kidney proximal tubule showing endocytosis. An electron-dese marker, ruthenium red, has been injected, filtered in the kidney glomerulus and reabsorbed in the proximal tubule, where it can be seen among brush border microvilli and in pinocytic vesicles and lysosomes.

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Photo credit: © JOSE CALVO / SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: -, biological, biology, black, border, brush, cell, convoluted, cytological, cytology, electron, endocytosis, glycocalyx, healthy, histological, histology, kidney, membrane, micrograph, microscope, microscopy, microvilli, monochrome, normal, pinocytosis, plasma, proximal, red, ruthenium, tem, transmission, tube, tubule, tubules, ultrastructure, vesicle, white