Respiratory System Flashcards
The respiratory system is everything you use to breathe and it is found in the chest cavity (Chest Area)
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Air passes through the nose or mouth then onto the trachea
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The trachea splits into two tubes called bronchi one going into each lung
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The bronchi splits into progressively smaller tubes called bronchioles
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The bronchioles finally end at small bags called alveoli where gaseous exchange occurs
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The diaphragm and external intercostal muscles help air to move in and out
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When you breathe in the diaphragm ad external intercostal muscles contract to move the ribcage upwards and expand the chest
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The you breathe out the diaphragm and external intercostal muscles relax moving the ribcage down and shrinking the chest. This forces air out of the lungs
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Oxygen and Carbon Dioxide are exchanged in the Alveoli
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The Cardiovascular and respiratory system have to work together to get oxygen to the muscles and carbon dioxide out of them
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The Cardiovascular and Respiratory system do this by exchanging gases between the alveoli and capillaries surrounding them
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Oxygen from the air you breathe into the lungs moves across from the alveoli to the red blood cells int the capillaries
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The Alveoli is surrounded by lots of capillaries which gives them a large blood supply to exchange gases
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The Alveoli have a large surface area, they are moist and have thin walls so gases can pass through them easily
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The Process if the gases moving across is called diffusion which means the gases move down a concentration gradient
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