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So blood doesn't flow backwards.

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13y ago

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How does the respiatory system use the circulatory system?

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Where was the earliest writings about the circulatory system?

Where was earliest known writings about the circulatory system found?Read more: Where_was_earliest_known_writings_about_the_circulatory_system_found


Why is closed circulatory system is more efficient than open circulatory system?

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What part of the human body is more complex your heart or your circulatory system?

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Where the earliest known writings about the circulatory system found?

Where was earliest known writings about the circulatory system found?Read more: Where_was_earliest_known_writings_about_the_circulatory_system_found


Where was earliest known writings about the circulatory system found?

Where was earliest known writings about the circulatory system found?Read more: Where_was_earliest_known_writings_about_the_circulatory_system_found


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What human systems supplies oxygen to the blood?

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What system responds by delivering more oxygen to the cells?

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Does a salmon have an open circulatory system?

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