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12 cards from this deck
Slow & inefficient over long distances
Volume increases faster than surface area
Lungs, gills, intestines
Provides more area for diffusion (e.g. alveoli, villi)
Reduce distance, speed up process
Transports substances quickly to/from cells
Maintains concentration gradients
O2 in, CO2 out via large SA & thin walls
Increase SA for nutrient absorption
Urea
Transports O2, nutrients, waste; complements diffusion
Respiration, nutrient uptake, waste removal
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