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RESPIRATORY SYSTEM

Explore the functions of the respiratory system to obtain oxygen and eliminate waste products from your body. Learn about the vital role of air, cellular respiration, key structures, breathing process, speaking mechanism, common diseases, and fun facts. Engage in hands-on experiments to understand the dynamics of breathing and respiration. Enhance your knowledge about this essential system in the human body.

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RESPIRATORY SYSTEM

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  1. RESPIRATORY SYSTEM 7th Grade Science

  2. FUNCTION To get oxygen from the environment and remove carbon dioxide and other waste products from your body.

  3. AIR Air is not made up only of oxygen, but of many other gases as well

  4. CELLULAR RESPIRATION Occurring inside your cells, this process uses oxygen in chemical reactions that release energy. It uses glucose and oxygen and releases carbon dioxide.

  5. STRUCTURES • Mouth/Nose • Epiglottis • Trachea • Lungs • Bronchial Tubes • Bronchioles • Alveoli • Diaphragm

  6. 1. Oxygen is supplied to the body (inhale) 2. Oxygen is carried to the body cells (cellular respiration) BREATHING

  7. BREATHING 3. Carbon dioxide is removed from cells to lungs (circulation) 4. Carbon dioxide waste is expelled (exhale)

  8. Path for air Trachea  Bronchi  Smaller tubes  Bronchioles  Alveoli

  9. SPEAKING • Air from lungs is forced between vocal cords • Vocal cords vibrate • Sound waves are generated • Sound waves are shaped to form specific sounds • The sound waves travel through the air and are interpreted as speech

  10. DISEASES Bronchitis: bronchioles swell and too much mucus Emphysema: alveoli enlarge Cancer: uncontrolled cell growth Asthma

  11. FUN FACTS • You breathe about 21,600 times per day. • If you spread out your lungs, they would cover the floor of a racquetball court (about 88 square yards)

  12. FUN FACTS You might get the hiccups if your diaphragm involuntarily tightens, sending air rushing into your lungs while your vocal chords shut. A sneeze shoot air out of your nose at about 100 miles per hour.

  13. Hold it! Directions: Complete each experiment and record your findings in a chart like the one below.

  14. Experiment 1: Hold your breath for as long as you can. Have your partner time you.

  15. Experiment 2: Breath normally. Have your partner time you for 30 seconds. Count your respirations (breaths).

  16. Experiment 3: Try to slow your breathing down. Count how few respirations you can take in 30 seconds

  17. Experiment 4: Run as fast as you can in place for 30 seconds. As soon as you stop running, count your respirations for 30 seconds.

  18. Experiment 5: Lie down for two minutes and try to relax. After two minutes count your respirations for 30 seconds.

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