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Respiratory System

Learn the vital functions of the respiratory system, organs involved, breathing process, regulation, effects of smoking, and common disorders like asthma, bronchitis, and emphysema.

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Respiratory System

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  1. Respiratory System In Class Notes:

  2. FUNCTION OF THE RESPITORY SYSTEM • Provides oxygen for cells • Removes carbon dioxide from body

  3. Organs that are involved • Mouth • Nose • Pharynx • Larynx • Trachea • Lungs • Epiglottis • Bronchi • Nasal cavity • Bronchioles • Alveoli • Diaphragm • Cilia

  4. Sequence Of Breathing • 1. Air pressure drops in lungs, and air enters. • 2. Diaphragm contracts, the lungs are pulled down and expanded. • 3. Diaphragm relaxes, and lungs contract. • 4. Air is forced out of lungs.

  5. Diagram:

  6. Parts you should know:

  7. Regulation of Breathing • Regulation is controlled by the brain • Breathing is involuntary; you can hold your breath, but the effect in temporary • Carbonic acid (carbon dioxide in water) levels dictate breathing • A drop in pH level increases breathing; a rise would slow breathing

  8. What effects does smoking have on the respiratory system? 500,000 deaths a year are related to smoking. Lung Cancer, Bronchitis, Emphysema, and other sicknesses are caused by it. Smoking can lead to poor health within the respiratory system.

  9. Name at least 3 disorders & provide a description: -Asthma – inflammation of the airways -Bronchitis – inflammation within the lungs -Emphysema- Destruction of lung tissue

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