In the middle of the gateway is an opening, a passage so low that we have to crawl into the next chamber. (discovermagazine.com)
The xenon flows into the next chamber, where the atoms are polarized through collisions with rubidium atoms (red) that are illuminated with circularly polarized light. (sciencedaily.com)
Two valves, tricuspid (at left in the image) and mitral (right), control blood flow into the next chamber of the heart. (discovermagazine.com)