Inside every living cell — from the amoeba floating in pond water to the neurons firing in your brain — something is constantly moving. 🔬 Materials enter, wastes exit, signals travel, and nutrients find their way to exactly where they're needed. Without this constant movement, life would stop in seconds. But how does a single cell manage transport without a heart, a lung, or a blood vessel? Avinto is ready to explore that mystery with you in Subtopic 3.1: The Concept of Transport in Living Organisms. 🌊 Type START to dive in!