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Which structure of the heart acts like an automatic door that closes once blood enters a chamber and forces it to exit in the proper direction?.
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Which structure of the heart acts like an automatic door that closes once blood enters a chamber and forces it to exit in the proper direction?.

User Chen Xing
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Valves help regulate the proper direction of contents in the body

User Geoff Adams
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Valves help regulate the proper direction of contents in the body
User Hollance
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