Oxygen Solubility Water severely limits oxygen solubility Animals Evolve: Respiratory Structures Lungs Gills Skin Air-breathing organs Mouth,

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Presentation transcript:

Oxygen Solubility Water severely limits oxygen solubility Animals Evolve: Respiratory Structures Lungs Gills Skin Air-breathing organs Mouth, guts, gas bladder, etc. Circulatory System Environment dictates the types of adaptations

Will Discuss Dead Zone vs Oxygen Minimum Zone Later

Oxygen Consumption Cardiac output x arterial-venous differences Cardiac output: heart rate x stroke volume Arterial-venous differences Dependant on activity state Properties of the blood

Convection Diffusion

Gas Delivery Diffusion through the ectoderm Open circulatory system Cell surface as the exchange site Limits the size of the organism Open circulatory system Mollusk and arthropods Blood in hemocoel Sluggish flow Closed circulatory system Blood contained within the vessels Pigments in the blood Myoglobin in hagfish Hemoglobin for the rest Active flow

Blood Circulation To deliver To remove Nutrients Oxygen Hormones Metabolic waste Pathogens Carbon dioxide Hydronium ions Temperature Organic phosphate

No circulatory system to open and closed system

Temperature

Terminology Gas Content : mL/L Partial Pressure: torr

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