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This is a medical (anatomically correct) model of the human heart,shown against a real EKG. (macro)

Stock Photo:
Image ID: 312814
Small
379x500 5.3"x6.9" (72dpi) 300 KB
Med
757x1000 2.5"x3.3" (300dpi) 914 KB
Large
3787x5000 12.6"x16.7" (300dpi) 8.1 MB
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