English English Proximal tubule kidney proximal tubule Proximal tubule Proximal tubule proximal Proximal tubule Proximal tubule English Proximal tubule Proximal tubule Proximal tubule Full article >>> Proximal tubule kidney proximal tubule English TUBULE (1D. Tiny biological channel, as in the kidney) Proximal tubule Full article >>> Proximal tubule English English proximal tubules English Proximal tubule