How carbon dioxide and oxygen transported in human beings
Answers
Exchange of gases takes place between the alveoli of lungs and the surrounding blood capillaries. The two main gases exchanged are oxygen and carbon-dioxide. Oxygen is absorbed by the blood capillaries from the lungs alveoli by diffusion while carbon-dioxide is absorbed by the lungs alveoli from blood capillaries by diffusion. Transport of oxygen and carbon-dioxide occurs with the help of respiratory pigment called hemoglobin. Hemoglobin, the iron containing respiratory pigment is a red colored pigment of blood, which has a very high affinity for oxygen. Hemoglobin though is purple colored but oxy-hemoglobin is of bright red color. Oxygen is transported from lungs to the body cells in the form of oxy-hemoglobin. Carbon-dioxide is transported from the body cell to the lungs in the forms of carboxy-hemoglobin, carbonic acid, bicarbonates of sodium and potassium.
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♥ Transport of oxygen - Haemoglobin present in the blood takes up the oxygen from the air in the lungs . It carries the oxygen to tissues which are deficient in oxygen before releasing it .
♥ Transport of carbon dioxide - Carbon
dioxide is more soluble in water .
Therefore , it is mostly transported from
body tissues in the dissolved form in our
blood plasma to lungs . It diffuses from
blood to air in the lungs .