ABOUT THIS PODCAST 🔗

Average audio length:
5 minutes
English
United States
4 episodes
since Sept. 28, 2026
episodic

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The moment after you swallow, a carefully timed sequence takes over. Muscles close one route, open another, and push food through a tube even if you are lying down. Over the next several hours, physical movement and chemistry turn a meal into material small enough to cross into the body. Inside th…

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Light reflects from a red cup and enters your eyes. Less than a second later, you experience shape, color, depth, and location. Yet there is no tiny red cup inside your head. Inside this episode: - Light Carries A Pattern - The Cornea Does Most Of The Bending - The Pupil And Iris - The Lens Adjus…
Take an ordinary breath, and air crosses a remarkable border. Oxygen moves from the outside world into your blood, while carbon dioxide moves toward the exit. The exchange happens across a surface folded deep inside your chest, where air and blood come within a tiny distance of each other. Inside …
Blood leaving your foot does not travel straight back to the foot. It returns to the right side of the heart, visits the lungs, enters the left side, and begins another trip through the body. The heart keeps this circuit moving with 4 chambers, 4 valves, and a rhythm generated inside the heart itse…
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