a)_Discuss the factors affecting gas exchange in the lungs 38-Upper Digestive Tract a)_Discuss the stomach and include one usual...

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Medical Sciences

a)_Discuss the factors affecting gas exchange in thelungs

38-Upper DigestiveTract
a)_Discuss the stomach and include one usual abnormalfinding

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Answer a Gas exchange is the delivery of oxygen from the lungs to the bloodstream and the elimination of the carbon dioxide from the bloodstream to the lungs It occurs in the lungs between the alveoli and a network of tiny blood vessels and capillaries which are located in the walls of the alveoli The thickness of the membrane The thickness of the respiratory membrane occasionally increasesfor instance as a results of edema fluid in the intersticial space of the membrane and in the alveoliso that the respiratory gases must then diffuse not only through the membrane but also through this fluid Also some pulmonary diseases cause fibrosis of the lungs which can increases the thickness of some portions of the respiratory membrane Because the rate of the diffusion through the membrane is inversely proportional to the thickness of membrane any factor that increases the thickness to more than 2 to 3 times normal can See Answer

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