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The Respiratory System

The Respiratory System. What is breathing ?. Refers to the movement of air into and out of your lungs. The two main functions of the respiratory system are:. 1: Moves oxygen from the outside environment into the body 2: Removes CO 2 and H 2 O from the body.

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The Respiratory System

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  1. The Respiratory System

  2. What is breathing? • Refers to the movement of air into and out of your lungs

  3. The two main functions of the respiratory system are: • 1: Moves oxygen from the outside environment into the body • 2: Removes CO2and H2O from the body

  4. What are alveoli? Where are they found? • Alveoli are air sacs found at the ends of the bronchioles • Gas exchange occurs • here

  5. The Pathway of Air Each step of the respiratory system: • 1: NOSE – blood vessels warm the air • Mucus & hair (cilia) trap particles to prevent them from going into the lungs

  6. Next…… • 2: PHARYNX – back of the throat, shared with the digestive system

  7. And then…. • 3: TRACHEA – windpipe, tube with a series of ridges lined with cilia and mucus

  8. Just a few more steps…. • 4: BRONCHI (lungs) – directs air into the lungs (main organs of the respiratory system), branch into smaller and smaller bronchioles

  9. And finally….. • 5: ALVEOLI – “grapes” or air sacs at the ends of the bronchioles, CO2 and O2 are exchanged here through the capillaries

  10. The gas exchange:What is exchanged inside the lungs? How does this exchange occur? • Air enters the alveoli, oxygen passes through the wall of the alveoli and then through the capillary walls into the RBC. Carbon dioxide passes through the capillary walls, through the alveoli walls and is breathed out

  11. Gas Exchange in Detail…..

  12. What is Cellular Respiration? • A chemical reaction inside cells • O2 + glucose Energy + CO2 + H2O

  13. Do you know why we_____? • Sneeze: http://kidshealth.org/kid/talk/qa/sneeze.html • Yawning: http://kidshealth.org/kid/talk/qa/yawn.html • Coughing: http://kidshealth.org/kid/word/c/cough.html • Hiccup: http://kidshealth.org/kid/talk/qa/hiccup.html

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