Respiratory system

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Respiratory system

  1. 1. The RESPIRATORY SYSTEM
  2. 2. • Breathing is the movement of the chest that brings air into the lungs and removes waste gases. –Air entering the lungs contains oxygen –Blood carries oxygen to the cells; oxygen delivered to the cells is used to release energy –This process is called cellular respiration
  3. 3. • Carbon dioxide and water molecules are waste products of cellular respiration • Exhaling eliminates carbon dioxide and water molecules
  4. 4. • The respiratory system is made up of structures that move oxygen into the body and move waste out • Air enters your body through either your nostrils or your mouth • Air passes through the nasal cavity and is filtered with the help of cilia, tiny hairlike structures
  5. 5. • The pharynx is a passageway that ends with a flap of tissue called the epiglottis • The epiglottis prevents food or liquid from entering the airway
  6. 6. • The larynx is the airway attached to the vocal chords • From the larynx, air moves to a tube called the trachea • The trachea connects the larynx to the bronchi
  7. 7. • The bronchi are two short tubes that carry air directly into the lungs • Once in the lungs, bronchi branch into smaller tubes called bronchioles
  8. 8. • Alveoli are clusters of tiny sacs at the ends of the bronchioles • The lungs are masses of alveoli which work with the heart to remove carbon dioxide from the blood and provide it with oxygen
  9. 9. • The diaphragm is a muscle beneath the lungs that contracts and releases to move gases in and out of the lungs
  10. 10. • Smoking is the most destructive habit a person can have. Many diseases and disorders of the respiratory system, as well as other body systems, are caused or aggravated by smoking. • The chemicals in cigarettes are poisonous and destroy healthy cells
  11. 11. • Bronchitis occurs when bronchial tubes become irritated and swell, producing too much mucus. • When it does not clear up in a matter of weeks, it is called chronic bronchitis
  12. 12. • Emphysema – alveoli in the lungs become enlarged; as a result, the alveoli cannot push air out of the lungs, so less oxygen can move into the bloodstream
  13. 13. • Asthma – bronchial tubes contract too quickly. Asthma is often caused by an allergic reaction. • Symptoms of asthma include shortness of breath, wheezing and coughing
  14. 14. • Lung cancer – when carcinogens in cigarette smoke (and other sources) enter the lungs, they can cause uncontrolled cell growth. • This is lung cancer, which can spread to other organs of the body • Lung cancer is the third leading cause of death in the United States
  15. 15. Carcinogens are poisons!

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