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What up with the small intestine and the large intestine? Join Cosmo and me—and our friend Franck Carbonero, microbiologist at Washington State University—to break down how we break down food.

You'll hear:

• how the intestines differ in size and function
• all about your gut bacteria
• the journey food takes through your digestive tract

Resources you can use:

• American Museum of Natural History's microbiology resources
• Frontiers for Young Minds' explainer on fermentation
• National Geographic Kids' info on the human digestive system

Sound effects courtesy Zapsplat

As always, submit burning questions at askdruniverse.wsu.edu. Who knows where your questions will take us next.