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10 cards from this deck
SA:V ratio becomes too small to meet metabolic demands
It decreases (volume increases faster than surface area)
Lungs (gas exchange), intestines (nutrient absorption)
Move materials between exchange surfaces and body cells
Surface area to volume ratio and activity level
Water-based liquid (e.g. blood)
Transport medium moves in bulk over large distances
Contain and direct transport medium throughout organism
Muscular contraction (body muscles or heart)
Natural passive processes (e.g. water evaporation)
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