Fine Structure of Renal Tubule Cells

An electron microscopic study of the renal tubule cells of rabbit by part was performed.1. Because of the apparent structural differences between the ceels of proximal convolution and the comparatively straight medullary portion, we added the straight medullary portion to Maximow-Bloom's classification of the nephron.2. In all parts of the nephron except the papillary duct, basal intus-susceptions were observed either in a well differentiated or an undifferentiated form.3. Two types of capillaries were seen in the medulla of the kidney. After the authors had corrected their first proof, the authors were given a chance to read Rhodin's work (International Review of Cytology, VII: 485-534, 1958). The authors believe that Rhodin's work is very excellent.The authors wish to express their gratitude to Prof. Tadayoshi Kobayashi and Dr. Yonosuke Watanabe for suggesting this investigation as well as for constant guidance in the course of work.