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Throat Sac Research Paper

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In most of frogs there is a throat sac, which is located right under their mouth, and it is helpful in amplifying their calls. The throat sac expands as a balloon when the air from the lungs fills it. What happens is the air travels from lungs, through larynx, causing vibration of vocal cords, which in turn produce a sound. That sound is carried over into the vocal sac where it resonates, and thus is amplified, making it
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