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1930s: The heart has 4 chambers. The auricles act as receiving chambers, while the ventricles pump the blood back into the body.

R

By Rick Ray

  • Stock footage ID: 26865733
Clip length: 02:01FPS: 29.97Aspect ratio: 16:9
HD$791920 × 1080MOV563.3 MB
SD$65852 × 480MOV73.7 MB
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