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Biology 11 Online
OpenStudy (anonymous):

Which of the following terms best relates to the mechanism that flatworms use to obtain oxygen? excretion spiracles pharynx diffusion

OpenStudy (anonymous):

diffusion, I think. Not 100% sure though

jabez177 (jabez177):

I thought it was spiracles.

OpenStudy (anonymous):

I think thats with insects

OpenStudy (anonymous):

"Flatworms get most of their oxygen through diffusion. Since they have no specialized circulatory system, their flatness gives them a greater surface area to absorb more oxygen. "

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