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Heart_interior.gif (450 × 332 pixels, file size: 45 KB, MIME type: image/gif)
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|current||14:49, 29 May 2007||450 × 332 (45 KB)||Elee||The illustration shows a cross-section of a healthy heart and its inside structures. The blue arrow shows the direction in which oxygen-poor blood flows from the body to the lungs. The red arrow shows the direction in which oxygen-rich blood flows from th|