explain transport of oxygen through respiratory system
Answers
Explanation:
Oxygen enters the body through the respiratory system, coming from the outside environment and into the lungs. It then crosses the alveolar membrane and capillary endothelium to get into the bloodstream. Once in the blood, oxygen needs to be transported to the various tissues of the body
Answer:
Transport of Oxygen :
Haemoglobin is a red coloured iron containing pigment present in the RBCs. Oxygen can bind with haemoglobin in a reversible manner to form oxyhaemoglobin. Each haemoglobin molecule can carry a maximum of four molecules of oxygen. Binding of oxygen with haemoglobin is primarily related to partial pressure of oxygen. Partial pressure of Carbondioxide, hydrogen ion concentration and temperature are the other factors which can interfere with this binding. A sigmoid curve is obtained when percentage saturation of haemoglobin with oxygen is plotted against the pO2. This curve is called the Oxygen dissociation curve and is highly useful in studying the effect of factors like pCO2, H+ concentration,etc., on binding of oxygen with haemoglobin. In the alveoli, where there is high pO2, low pCO2, lesser H+ concentration and lower temperature, the factors are all favourable for the formation of oxyhaemoglobin, whereas in the tissues, where low pO2, high pCO2, high H+ concentration and higher temperature exist, the conditions are favourable for dissociation of oxygen from the oxyhaemoglobin. This clearly indicates that oxygen gets bound to haemoglobin in the lung surface and gets dissociated at the tissues. Every 100 ml of oxygenated blood can deliver around 5 ml of oxygen to the tissues under normal physiological condition.