Maintaining the Body's Chemistry: Dialysis in the Kidneys
This site is a tutorial on kidney structure and function. The diagrams are well done and correlated with the function of each part of the kidney. Detailed descriptions of how water and ions are actually moved through the membrane channels are provided. Study questions are provided on membrane channels, diffusion and concentration gradients (including a video on movement of molecules during diffusion), and membranes and concentration gradients within the kidney. The tutorial concludes with a discussion of artificial kidney dialysis.