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Vertebrate Circulation

Vertebrate Circulation. From Fish to Mammals. Fish Circulation. Fish. Diagram. One way Sinus venosus to atrium to ventricle to conus arteriosus to gills to tissues back to the SV. http://www.hhmi.org/biointeractive/circulatorium/frames.html. Amphibian Circulation. Loop

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Vertebrate Circulation

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  1. Vertebrate Circulation From Fish to Mammals

  2. Fish Circulation Fish Diagram • One way • Sinus venosus to atrium to ventricle to conusarteriosus to gills to tissues back to the SV. • http://www.hhmi.org/biointeractive/circulatorium/frames.html

  3. Amphibian Circulation • Loop • Septum separates atria into right and left halves • Pulmonary veins carry oxygenated blood from the lungs to the heart through the left atrium • Ventricle pumps blood from the heart • Deoxygenated blood enters The right atrium to the sinus venosus to the ventricle through the Pulmocutaneous artery to the lungs. http://www.hhmi.org/biointeractive/circulatorium/frames.html • Diagram

  4. Reptile Circulation • Septum extends into the ventricle • Blood going to the body is more oxygenated than amphibians • Ectothermic – cannot maintain body temp. through metabolism. Must get heat from external source

  5. Bird and Mammal Circulation • 4 chambered heart • No mixing of blood • Birds have multiple airs sacs for the most oxygen available to the lungs. • Mammals have less oxygen per unit blood

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