Oceanography question, please only answer if you truly understand it. I have pos
ID: 177748 • Letter: O
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Oceanography question, please only answer if you truly understand it. I have posted this before and I got an incorrect answer... I have attached notes that I have to relate back to.
10. We discussed counter current Blood flow with countercurrent heat exchange exchange of oxygen in fish gill. This arrangement has highly oxygenated seawater making its Warm arterial blood from the heart Cold initial contact with the most oxygenated blood of the gills: and Cool venous blood to the heart so the least oxygenated seawater will be in contact with the least oxygenated blood Some fish like tuna living in cold water, are able to regulate their internal body temperature with countercurrent heat exchange. In a comparable manner the coldest arterial blood near the skin meets the coldest venous blood. How does this help tuna living in cold water? pts)Explanation / Answer
Large muscles with a heavy blood flow alongwith a special network of blood vessels which transfer heat inside the body core occurs in tuna because blood warmed by exertion passes by cooler blood (which is the "counter current" part). One of the cold-blooded animal is tuna whose body temperature experiences a much broader swing than can be tolerated by a typical warm-blooded animal. It can also be an example of a pseudo-warm blooded creature, as it can fairly sustain in an internal body temperature elevated over the ambient water temperature.The blood vessels of Tuna inside the swimming muscles are arranged in parallel arrays as a result the warmed venous blood transfers its heat efficiently to the incoming arterial blood which helps in returning back much of it to the red muscle core. However antiparallel arrangement of blood vessels results in increasing the heat retention to a maximum.
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