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Respiratory System Respiratory System-set of organs that supply your body with oxygen and rid your body of carbon dioxide. – Breathing in and out are the basic actions of the respiratory system. – The respiratory system is a non-voluntary action. You don’t have to think about it to make it work. Respiratory System Parts of the Respiratory System – Mouth-passage for air to enter and exit the body. – Nose-other passage way for air. Cilia-tiny hair-like projections that trap dirt and particles from the air. (filter) – Epiglottis-flap of tissue in back of mouth that covers the trachea, preventing food from entering it. Respiratory System – Trachea-tube in the throat that takes air to and from the lungs. – Bronchi-two tubes that branch from the trachea to each lung. – Lungs-two large organs that exchange oxygen and carbon dioxide. – Diaphragm-muscle below lungs that expands and relaxes to produce breathing. How Breathing Works Inhaling – Diaphragm moves down. – Rib cage expands, making room in the chest. – Air rushes into the body, to the lungs. How Breathing Works Inside the lungs – The bronchi divide into smaller passages called bronchioles. – Air passes through bronchioles into the alveoli which are surrounded by capillaries. – Oxygen moves into the bloodstream and carbon dioxide from the blood enters the alveoli. How Breathing Works Exhaling – Diaphragm pushes up. – Rib cage move in and down, forcing air out of the lungs. – Air with carbon dioxide move back through bronchioles and bronchi, up the trachea and out of the mouth and/or nose. Problems Of The Respiratory System Cold/flu Pneumonia Asthma Tuberculosis Emphysema Lung cancer Caring For Your Respiratory System Don’t smoke Avoid second hand smoke Take care of your body if you have any respiratory illness.