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Purpose of the Respiratory System

Purpose of the Respiratory System. gas exchange : absorbs oxygen from the air you breathe and releases carbon dioxide when you exhale Breathing: two major actions Inhaling : oxygen is pulled into the organism’s lungs. Exhaling : Air is pulled out of the organism’s lungs.

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Purpose of the Respiratory System

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  1. Purpose of the Respiratory System gas exchange: absorbs oxygen from the air you breathe and releases carbon dioxide when you exhale Breathing: two major actions Inhaling: oxygen is pulled into the organism’s lungs. Exhaling: Air is pulled out of the organism’s lungs. diaphragm dome shaped muscle underneath the lungs, which contracts and relaxes in the chest cavity to move gases in and out of your lungs

  2. Path of Air Flow Nose- cleans the air of impurities, warms the air if it is too cool, moistens the air if it is dry Pharynx- the throat; branches into two tubes, one leads to the stomach and the other leads to the lungs; epiglottis flap of tissue that controls the path the food or air will take Larynx- voice box, contains vocal cords which vibrate to create sound Trachea- windpipe, allows air to travel from larynx to lungs Inside the Lungs Bronchi- two short tubes that lead to each lung Bronchioles- smallest tubes that lead to the site of gas exchange Alveoli: clusters of tiny air filled sacs where gas exchange takes place

  3. Lungs major organ of the Respiratory System; sponge-like organ; left lung slightly smaller than the right lung due to the placement of the heart

  4. Medical Problems Asthma- inflammation of the bronchioles that makes it difficult to breathe; causes attacks of coughing, wheezing, tightness in the chest, and shortness of breath. Bronchitis- irritation in the lining of the bronchioles Pneumonia- a respiratory condition in which there is inflammation of the lung; symptoms include fever, cough, chest pain, shortness of breath, chills, and coughing up blood. Lung cancer- uncontrolled growth of cells in the lining the bronchi and bronchioles.

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