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Respiratory System

Respiratory System. Do Now. Matching Quiz! Peer Corrections. Homework Due Today. Read 33.3 – The Respiratory System Define Larynx Pharynx Trachea Diaphragm. Homework Review. Larynx Contains 2 highly elastic folds of tissue known as the vocal cords Pharynx

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Respiratory System

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  1. Respiratory System

  2. Do Now Matching Quiz! Peer Corrections

  3. Homework Due Today • Read 33.3 – The Respiratory System • Define • Larynx • Pharynx • Trachea • Diaphragm

  4. Homework Review • Larynx • Contains 2 highly elastic folds of tissue known as the vocal cords • Pharynx • Cavity at the back of the mouth in which air passes • Trachea • Windpipe • Diaphragm • At the bottom of the chest cavity; large dome-shaped muscle responsible for creating ‘negative pressure’ to allow for respiration

  5. Homework Due Friday Read 35.1 Answer questions 1a, 1b, 2a on page 1013

  6. Respiratory System • What does it do? • Picks up oxygen from air we inhale • Release Carbon Dioxide (CO2) in the air we exhale

  7. Respiratory System Structures Nose Pharynx Larynx Trachea Lungs Bronchus Bronchioles Alveoli

  8. Gas Exchange • What gases need to be “exchanged”? • Alveoli – End of air flow • Oxygen dissolves into moisture, then diffuses across capillary walls into blood • Diffuses across because the oxygen concentration is less inside the blood • CO2 diffuses into alveoli from capillaries because the concentration of CO2 is less in the alveoli

  9. Gas Exchange Respiratory System & Gas Exchange

  10. Flowchart Exercise! • Using the given words, create a flowchart to show the passage of oxygen into the blood stream • Bronchioles • Larynx • Nose • Alveoli • Pharynx • Bronchus • Capillary • Trachea

  11. Diffusion • Moving from high concentration to low concentration • 100 people in Athletic Office • “Passive Process” • Diffusion of oxygen occurs until concentrations are the same • Hemoglobin binds to dissolved oxygen, removing it from plasma, allowing for more diffusion • 60 times more!

  12. Breathing • Majority of breathing is voluntary • However, whether conscious or unconscious, nervous system has the ‘final say’ • Medulla oblongata • Helps the body function when unconscious • Breathing • BP • Heart rate

  13. Smoking & Respiratory System • 3 most dangerous substances • Nicotine • Carbon Monoxide • Tar

  14. Smoking • Nicotine • Addictive stimulant • Increases HR and BP • Carbon Monoxide (CO) • Poisonous gas • Blocks hemoglobin from binding with oxygen • Tar • Contains at least 60 compounds known to cause cancer

  15. Homework Due Friday Read 35.1 Answer questions 1a, 1b, 2a on page 1013

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