In a developing embryo, the heart begins to beat long before developing nerves reach it. How is
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In a developing embryo, the heart begins to beat long before developing nerves reach it. How is the embryonic heart able to beat without nervous system control?
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Related Book For
Conceptual Integrated Science
ISBN: 9780321818508
2nd Edition
Authors: Paul G Hewitt, Suzanne A Lyons
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