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The respiratory and circulatory systems work together to deliver oxygen to cells of the body (the lungs through air exchange, and the circulatory system by delivery of haemoglobin containing red cells to the capillaries where oxygen is released into the tissues) and removal of carbon dioxide.The circulatory system delivers nutrients absorbed through the walls of the small intestine to other organs (such as the liver, muscles, brain, heart), and delivers oxygenated blood to the digestive system.You breathe in oxygen into your lungs.
The oxygen diffuses across the thin walls of the alveolar in the lungs and the thin walls of the blood vessels in the lungs into the bloodstream. Here it attaches to the haemoglobin molecules inside red blood cells.The red blood cells are carried by the blood vessels to all parts of the body. The haemoglobin releases oxygen in the periphery, and picks up carbon dioxide(CO2). The CO2 attached to the haemoglobin molecules in the red blood cells is then transported to the lungs, where it diffuses across the walls into the alveolar, andis breathed out.When your blood gets to your lungs, the oxygen from your lungs get put into your bloodstream. Then it goes back to the heart, with the oxygen-enriched blood being delivered to all parts of your body.
Essentially, the respiratory takes in the air, and the circulatory circulates it around the body. We breathe in air, which contains oxygen, and this oxygen is carried by our red cells around the body. If our respiratory system is poor, our oxygen would not be enough, we would become breathless etc. the respiratory system gives oxygen to the blood cells in the circulatory system. Also, they both contain the lungs and gives blood. The respiratory system provides oxygen to the blood. The Circulatory system carries the oxygenated blood throughout the body, keeping cells(and you) alive and functioning well. When you breathe in air it goes in your lungs and the oxygen diffuses into the bloodstream via the capillaries. Then the oxygen is carried throughout your body as needed.
The respiratory system would not function without the circulatory system, and vice versa. The circulatory system requires oxygen, and it only gets this oxygen when the blood passes through the lungs and collects oxygen to bring to the rest of your body. The respiratory system uses blood to replenish itself within the lungs, continuing its normal function.The heart pumps blood into the lungs where the blood is oxygenated. The blood is then returned to the heart and the newly oxygenated blood is circulated to the rest of the body.
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