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Respiratory System

Discover the essential role of the respiratory system in breathing and gas exchange, as well as the detrimental effects of smoking on lung health. Learn about the structure and function of the respiratory organs and understand why smoking is a leading cause of respiratory diseases, including lung cancer and emphysema.

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Respiratory System

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  1. Respiratory System 2.2 Notes Part 3

  2. What is it for? • 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 • Epiglottis • Larynx- (Voice Box.) It contains your vocal cords. Which vibrate when air passes through them creating your voice • Esophagus • 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

  4. 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

  5. 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.

  6. 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

  7. Homework Textbook Questions P. 95 #1-15 +18 Circulatory System stuff 1-6, 11, 13, 15 Respiratory Stuff 7-10, 12, 14, 18

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