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Understanding the Respiratory System for Better Health

Explore the purpose and organs of the respiratory system, from the trachea to the alveoli, to understand how it provides oxygen to cells and removes carbon dioxide. Learn about its relationship to the digestive system and the essential process of cellular respiration.

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Understanding the Respiratory System for Better Health

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  1. The Respiratory System

  2. Purpose of the respiratory system • To provide a constant supply of oxygen to keep your body cells functioning • To remove carbon dioxide from the body cells

  3. Organs of the respiratory system • Trachea • Bronchus (bronchi) • Bronchioles • Alveoli • Pleura • Diaphragm • Nose / mouth • Nasal cavity • Pharynx • Epiglottis • Larynx • Trachea Lungs

  4. http://www.bbc.co.uk

  5. Mouth & Nose • Brings air into the body • Nasal hairs in nostrils trap dust

  6. Nasal cavity • Warms & moistens air • Glands that produce sticky mucus line the nasal cavity • cilia sweep mucus and trapped material to the back of the throat where it can be swallowed • traps dust, pollen, and other materials that were not trapped by nasal hairs

  7. Pharynx • Tube-like passageway used by food, liquid, and air • At the lower end of the pharynx is a flap of tissue called the epiglottis • covers the trachea during swallowing so that food does not enter the lungs

  8. Larynx • “Voice box” • The airway to which two pairs of horizontal folds of tissue, called vocal cords, are attached

  9. Trachea • Air-conducting tube • Connects the larynx with the bronchi • Lined with mucous membranes and cilia • Contains strong cartilage rings

  10. Bronchi • Two short tubes that branch off the lower end of the trachea • Carry air into the lungs. • Singular - bronchus

  11. Bronchioles • Tiny branches of air tubes in the lungs • Connect bronchi to alveoli

  12. Alveoli • Tiny, thin-walled, grapelike clusters at the end of each bronchiole • Surrounded by capillaries • Where carbon dioxide and oxygen exchange take place • Singular - alveolus

  13. http://mhln.com

  14. Diffusion http://www.borg.com/~lubehawk/hrespsys.htm

  15. Pleura • Membrane lining the lungs and chest cavity

  16. Diaphragm • Muscle wall between the chest and the abdomen that the body uses for breathing

  17. http://mhln.com

  18. Relationship to digestive system • Cellular respiration requires glucose and oxygen to release energy to thebody • C6H12O6  +  6O2  6CO2  +  6 H2O  +  Energy • Oxygen is provided by the respiratory system • Glucose is provided by the digestive system

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