How Do Cells Communicate? (Cell Communication): Crash Course Biology #25

Even though it might seem like our bodies are on autopilot, there is a whole lot happening inside us to keep things moving. In this episode of Crash Course Biology, we’ll learn that our cells are in constant communication, reminding each other—and themselves—to perform important functions like breathing, walking, or even sleeping. Chapters: Behind the Scenes 00:00 Cell Communication 2:00 How Cells Respond to Signals 4:19 Platypus Reproduction 5:24 Types of Signaling 6:52 Review & Credits 9:40 This series was produced in collaboration with HHMI BioInteractive, committed to empowering educators and inspiring students with engaging, accessible, and quality classroom resources. Visit for more information. Check out our Biology playlist here: Watch this series in Spanish on our Crash Course en Español channel here: