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The Respiratory System

Learn about the respiratory system and how it moves oxygen into the body and removes carbon dioxide. Explore the path of air, the role of mucus and cilia, and understand the process of respiration. Label and color the different parts of the system.

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The Respiratory System

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  1. The Respiratory System

  2. Respiratory system: moves oxygen into the body & removes carbon dioxide produced as wastes.

  3. Respiration… Chemical process that uses oxygen to release energy from food.

  4. Breathing… process of moving air into & out of the body.

  5. Diaphragm… large muscle at the base of the lungs that contracts & relaxes with the rib muscles causing you inhale & exhale.

  6. Path of air to lungs… Pharynx=> Nose (mouth)=> Trachea=> Bronchus=> Bronchial tubes=> Bronchioles=> Alveoli

  7. Mucus… traps dust & bacteria… moistens air to keep nasal tissues from drying out.

  8. Cilia… tiny hair like structures that line the nasal cavities & clean air by sweeping mucus, dust & bacteria to be swallowed & destroyed by the stomach acid.

  9. Pharynx… area of the throat shared with the digestive system where air passes to lungs from nose/ mouth.

  10. Trachea… tube lined with cilia, mucus & rings of cartilage that keep it open so air can pass to the lungs.

  11. ...sealed shut when you swallow by the to keep food from entering. epiglottis

  12. Larynx… located at the top of the trachea… “vocal chords” vibrate as air pass through to make your voice.

  13. Bronchus & bronchial tubes… tubes that branch to move air from the trachea into each lung.

  14. Alveoli… tiny, hollow air sacs in the lungs surrounded by blood vessels for gases to move in & out of the blood.

  15. Gas exchange: oxygen diffuses through the wall of the alveoli then through the wall of the capillaries to get into the blood…

  16. …at the same time, carbon dioxide diffuses from the bloodinto the alveolito be exhaled.

  17. Label and Color! (page 40)

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