DescriptionMurray materials in leaf and insect with a parent pore (radius r0) connecting to many children pores (radius ri). .jpg
English: For efficient photosynthesis with energy storage, plants possess leaf veins which show increasing number of branches and narrowing porous channels from macro to micro levels for water and nutrient transfer. For efficient breathing with energy conversion, insects employ open spiracles with similar porous networks for gas diffusion.
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