[Kidney filtration -- mechanisms and methods of investigation (author's transl)].

Quantitative data are presented on the glomeruli in the human, dog and rat kidney. Micropuncture techniques for the determination of filtration pressure and filtration rate are described. The final part of this paper deals with the dynamics of glomerular ultrafiltration. The roles are discussed of filtration equilibrium/disequilibrium and of the renin-angiotensin systems in the filtration process.