O2 and Co2 are transported throughout human body by blood. 97% of O2 combines with haemoglobin of RBCs to form oxyhaemoglobin within the lungs. The oxyhaemoglobin then gives out O2 to all the cells. The remaining 3% gets dissolved in blood plasma. 70% of CO2 gets dissolved in blood plasma to reach the lungs from the tissues. The remaining contents of Co2 then combines with haemoglobin to form carboxyhaemoglobin to reach the lungs from the tissues.
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Haemoglobin transports oxygen molecule to all the body cells for cellular respiration. The haemoglobin pigment present in the blood gets attached to four O2 molecules that are obtained from breathing. It thus forms oxyhaemoglobin and the blood becomes oxygenated. This oxygenated blood is then distributed to all the body cells by the heart. After giving away O2 to the body cells, blood takes away CO2 which is the end product of cellular respiration. Now the blood becomes de-oxygenated.
Since haemoglobin pigment has less affinity for CO2, CO2 is mainly transported in the dissolved form. This de-oxygenated blood gives CO2 to lung alveoli and takes O2in return.
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Haemoglobin transports oxygen molecule to all the body cells for cellular respiration. The haemoglobin pigment present in the blood gets attached to four O2molecules that are obtained from breathing. It thus forms oxyhaemoglobin and the blood becomes oxygenated.This oxygenated blood is then distributed to all the body cells by the heart. After giving away O2to the body cells, blood takes away CO2which is the end product of cellular respiration. Now the blood becomes de-oxygenated.
Since haemoglobin pigment has less affinity for CO2, CO2is mainly transported in the dissolved form. This de-oxygenated blood gives CO2to lung alveoli and takes O2in return.
Transportation of O2and CO2in blood
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Haemoglobin transports oxygen molecule to all the body cells for cellular respiration. The haemoglobin pigment present in the blood gets attached to four O2molecules that are obtained from breathing. It thus forms oxyhaemoglobin and the blood becomes oxygenated.This oxygenated blood is then distributed to all the body cells by the heart. After giving away O2to the body cells, blood takes away CO2which is the end product of cellular respiration. Now the blood becomes de-oxygenated.
Since haemoglobin pigment has less affinity for CO2, CO2is mainly transported in the dissolved form. This de-oxygenated blood gives CO2to lung alveoli and takes O2in return.
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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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