Why are cells small?
This article explains the physical constraints of surface area-to-volume ratio and diffusion that dictate why biological cells remain small. It highlights how these fundamental laws of physics limit cell size to ensure efficient nutrient intake and waste removal.
Why it matters
Understanding cellular constraints is foundational to biology and helps explain the evolutionary design of organisms and their metabolic processes.
Two physical constraints — surface area and diffusion — explain why cells are so small.
The content is purely scientific and educational, focusing on biological principles without political or social framing.
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