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Respiratory System

Learn about the respiratory system functions, interesting facts, and common disorders such as bronchitis, emphysema, lung cancer, and asthma. Discover how breathing, gas exchange, and cellular respiration occur in this vital system.

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Respiratory System

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  1. Emphysema Respiratory System influenza Bronchitis

  2. Respiratory System Functions (Jobs) • Getoxygen from environment • Remove waste (carbon dioxide, water) • Produce sound

  3. Respiratory System • A person at rest takes an average of 12-15 breaths per minute • Your right lung is slightly larger than your left lung • The surface area of your lungs is about the size of a tennis court • A sneeze travels faster than a cough (100 mph vs. 60 mph) • Facts

  4. Respiratory System • Oxygen (O2) is needed by the cells in the body to stay alive and perform their specific jobs • Glucose (sugar) is also used to release energy • Carbon dioxide (CO2) and water (H2O) are created during this process and are waste products that must be removed • Cellular Respiration O2 In CO2 Out

  5. Check Yourself • In two sentences, summarize cellular respiration. • Try to write a formula for cellular respiration. • Cellular Respiration O2 In CO2 Out

  6. Respiratory System • Oxygen breathed into lungs (inhaled) • Alveoli (air sacs) allow oxygen to move into blood stream • Red blood cells carry oxygen to cells of body • Oxygen moves into cells • Gas Exchange • (Inhale) O2 In

  7. Respiratory System • Carbon dioxide is removed from cells • Red blood cells carry CO2 to lungs • Alveoli allow carbon dioxide to leave blood stream • Carbon dioxide is breathed out of lungs (exhaled) • Gas Exchange • (Exhale) CO2 Out

  8. Respiratory System • The diaphragm is muscle that controls the movement of air in and out of lungs • When diaphragm contracts, lungs expand and take in air • When diaphragm relaxes, lungs contract and push out air • Breathing • Breathing • Simulation

  9. Respiratory System • The nose warms air filters out particles and adds moisture • The epiglottis blocks out food and liquids when you swallow • The trachea directs air down to the lungs • Other • structures

  10. Check Yourself • In a few sentences, summarize the path that air takes and what happens to it on the way to the lungs. • What do you think would happen if your epiglottis didn’t close the stomach off all the way when you breathed in?

  11. Respiratory System • Bronchitis • Bronchial passages within the lungs narrow & then become clogged with mucus. • Emphysema • Alveoli within the lungs become damaged or destroyed preventing the effective exchange of oxygen & carbon dioxide. • Lung cancer • Uncontrolled growth of lung cells that produce tumors that prevent the lung from operating effectively. • Asthma • Disorder where the passageways in the lungs swell and become narrow making it difficult for the lungs to take in air • Diseases

  12. Respiratory System • Speaking/singing/whispering – air moves over vibrating vocal cords • Exhale – removes extra moisture • Coughing/sneezing – remove items from windpipe or lungs • Sighing • Yawning • Hiccupping • Laughing • Crying • Other Jobs

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