The foot processes of podocytes are the main filtration barrier in the kidney. This is a colored-in scanning electron microscope of podocyte cells in the kidney. Each green blob is a single podocyte contributing a multitude of purple interlocking foot processes.
To anyone who has a fascination with the bizarre, the body, or is facing the immensely difficult choice of "should I be a doctor".
I have been you. Here are the results.