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The Excretory System: From Your Heart to the Toilet – CrashCourse Biology #29

The Excretory System: From Your Heart to the Toilet –  CrashCourse Biology #29

One of the coolest and most important things that our bodies do is maintain this thing called homeostasis, the regulation of a stable internal environment, no matter where we are or what we’re doing. After all, we put our bodies through a lot every single day: We’re always adding food and liquid and chemicals, and …