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Shark Research at University of Miami - A pump is placed in the mouth to allow water to flow over the sharks gills and simulate ram ventilation. | Facebook
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How Fish Breathe: Ram Ventilation, Buccal Pumping – Poseidon's Web
Which fish are obligate ram ventilators?
PPT - Bony vs Cartilaginous Fish PowerPoint Presentation, free download - ID:4176292
Structural adaptations for ram ventilation: Gill fusions in scombrids and billfishes - Wegner - 2013 - Journal of Morphology - Wiley Online Library
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Shark Gills: How Do They Work and How Do Sharks Breathe? - AZ Animals