Which of the following statements regarding the respiratory systems is FALSE? Gills serve as extensions from the body that are specialized breathing structures Most mammals such as humans use internal respiratory structures in order to perform gas exchange O Earthworms and other animals that breathe through their skin require the use of additional tube-like structures O The tracheal system has no interaction with the circulatory system Question 2 Which of the following options correctly lists the direction of carbon dioxide travel as it leaves the body?

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