7.2 the Respiratory Structre

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    7.2The respiratory structures andbreathing mechanisms in humansand animals Prepared byAzneezal Ar-Rashid6 October 2009    Curious to know about.. ãProtozoaãInsectsãFishãAmphibianãHuman?    Respiratory structure of organisms OrganismRespiratory structureHumanLungsProtozoaPlasma membraneFish GillsInsectTracheal systemAmphibian LungsSkinMouth    Protozoa,eg : Amoeba sp., Paramecium sp. ãUnicellular   –Does not need any special respiratory structure ãPlasma membrane  –Serves as its respiratory surface ãVery small in size  –Has a relatively LTSA (large total surface area) ãBody surface is always moist  –It lives in the pond and lake, to allow gases to dissolve easily ãSimple diffusion  –Takes place quickly, across the thin plasma membrane
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