There's a diagram, it's right at the top. Here's a direct link if for some reason you can't see images on wikipedia: https://upload.wikimedia.org/wikipedia/com

There's a diagram, it's right at the top. Here's a direct link if for some reason you can't see images on wikipedia: https://upload.wikimedia.org/wikipedia/commons/5/52/Tesla_valve_cross-section.png https://upload.wikimedia.org/wikipedia/commons/5/52/Tesla_va...