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Preksha Dhyana :
air. Transporting facility is provided by the haemoglobin in the red blood cells.
GAS EXCHANGE IN THE LUNGS & TISSUES
The right side of the heart pump deoxygenated blood from the body tissues into the pulmonary artery to the lungs.
In the lungs blood is oxygenated. The oxygenated blood fiows in the pulmonary vein to the left side of the heart.
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Transport of Gases in the Blood
The blood leaving the lungs is a bright scarlet red. Each haemoglobin molecule can combine (reversibly) with four molecules of oxygen. This oxygenated red blood flows to the heart and from there out into the systemic circulation. There is a continued diffusion of oxygen out of the red cells through the capillary membranes into the tissue fluid and from there into the cells.
The transport of carbon dioxide is more complex than
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