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Multicellular organisms Essay Topics & Paper Examples

Reason why multicellular organisms have materials exchange problems

Multicellular organisms have materials-exchange problems because they have a small surface area to volume ratio. ¬†As such they have a small surface area for the exchange of materials between the cells and their surroundings. Materials are not able to reach all parts of the cells quickly since the volume is too large relative to the surface area. Material exchange occurs through diffusion, osmosis and active transport – this is dependent on the size of the surface area. The larger the surface area the higher the rate of material exchange; and the small the surface area the slower the rate of material exchange (Farabee, 2006). Three functions of the liver The liver functions as a storage organ storing vitamins, minerals and…