Quizzes & Puzzles2 mins ago
blood flow to the heart
3 Answers
Can anyone trace the circulation of blood through the heart starting at the right atrium and ending at the right atrium?
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http://scienceblogs.com/clock/upload/2006/06/c irculation.jpeg
http://scienceblogs.com/clock/upload/2006/06/c irculation.jpeg