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Respiratory System

Respiratory System. Chapter 2.3 Notes Part 2. Function of the Respiratory system. Breathe in oxygen, breathe out carbon dioxide Lungs = important organs. Order Air Travels to Your Lungs.

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Respiratory System

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  1. Respiratory System Chapter 2.3 Notes Part 2

  2. Function of the Respiratory system • Breathe in oxygen, breathe out carbon dioxide • Lungs = important organs

  3. Order Air Travels to Your Lungs • Nasal Cavity- air is warmed and filtered by tiny hairs, called cilia, and mucus in your nose. The cilia and mucus trap dirt and other particles - back out the nostril or down into the digestive system • Pharynx – back of the throat • Epiglottis – flap that covers the trachea • Larynx- (Voice Box.) It contains your vocal cords. Which vibrate when air passes through them creating your voice • Esophagus

  4. Order Continued • Trachea- Made up of C-shaped bands of cartilage that maintains the tubular shape • Bronchi- Air passes through these tubes and goes directly to the lungs • Lungs- Goes to tiny, thin- walled sacs called the alveoli. Where gas exchange takes place

  5. Gas Exchange in the Alveoli • Alveolus surrounded by capillaries • Carbon dioxide diffuses into the alveolus, and oxygen diffuses the other way into the capillaries and binds with the red blood cells • The oxygenated blood returns to the heart to be pumped to the rest of the body • This entire process is • called gas exchange

  6. Smoking • Many respiratory diseases such as lung cancer and emphysema results from smoking tobacco products • Emphysema causes the alveoli walls to lose their elasticity, making breathing extremely hard as the disease progresses • Often people who have respiratory • diseases also have a heart disease.

  7. Normal Lung Smokers Lung

  8. What is in a cigarette? • Smoking is the number one cause of lung cancer There are over 4000 chemicals in a cigarette • 50 are carcinogenic (Cancer- causing) • Top six most harmful chemicals in a cigarette are: nicotine, tar, carbon monoxide, formaldehyde, hydrogen cyanide, and benzene • Smoking also destroys the cilia lining your respiratory tract

  9. What is in a Cigarette

  10. Your Turn • Textbook Questions P. 95 #7-10, 12, 14, 18 • Find out more info in a small paragraph about one of the many diseases of the respiratory tract /10 • Examples you could look at are: • Chronic Obstructive Pulmonary Disease (COPD) • Asthma • Chronic Bronchitis • Pulmonary Emphysema • Acute Bronchitis • Cystic Fibrosis • Interstitial Lung Disease/Pulmonary Fibrosis • Occupational Lung Diseases • Pneumonia • Primary Pulmonary Hypertension • Pulmonary Embolism • Pulmonary Sarcoidosis • Tuberculosis

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