human_reference_atlas Homo sapiens nephron tubule proximal tubule AS proximal tubule proximal tubule kidney proximal tubule TODO - ensure definition works across species. renal proximal tubule Proximal Tubule MA:0002611 UBERON:0004134 MESH:D007687 uberon In mammals, the proximal tubule is a nephron tubule that connects Bowman's capsule to the loop of Henle. It has a brush border epithelial morphology[GO]. proximal kidney tubule CALOHA:TS-0509 EMAPA:28281 BTO:0001498 region of nephron tubule