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the structure that separates the right ventricle from the pulmonary artery. It prevents the...

Subject:

a blood vessel that returns oxygenated blood from the lungs to the left atrium of the heart.

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the space in the middle of the tooth which contains cells, blood vessels and a nerve.

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solidified froth from a volcano

pun

a figure of speech that makes a deliberate play on two possible meanings of a word, or on two...

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