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Understanding the Respiratory System: Importance of Breathing

Explore the vital process of breathing in the human body. Discover how all cells require oxygen for cellular respiration to produce energy and how the respiratory system functions to supply the blood with oxygen and remove carbon dioxide. Follow the pathway of air as it enters through the nose or mouth, passing through the pharynx, larynx, trachea, and into the lungs where gas exchange occurs in the alveoli. Learn about lung anatomy, including the branches of the trachea and bronchioles, and the role of alveoli in oxygenation. Understand the mechanics of inhalation and exhalation as lungs expand and contract with the movement of the diaphragm.

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Understanding the Respiratory System: Importance of Breathing

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Presentation Transcript

  1. Respiratory System Take a big whiff!

  2. Why do we need to breathe? • All cells need oxygen • Cellular Respiration:Process of breaking down glucose into ATP

  3. Primary Functions • Supply blood with O2 • Remove CO2

  4. Pathway of Air 1. Air enters through nose or mouth 2. Passes through pharynx

  5. Pathway of Air (cont.) 3. Larynx (voice box) 4. Trachea (wind pipe) 5. Lungs

  6. Pathway of Air (cont.) • CO2 & O2 exchanged in tiny sacs called alveoli

  7. Pathway of Air (cont.) • Alveoli help to warm & moisten the air

  8. Lung Anatomy • Trachea has 2 branches • Divided further into bronchioles

  9. Lung Anatomy (cont.) • Alveoli are at end of bronchioles • O2 enters blood • CO2 enters alveoli

  10. Inhalation 1. Lungs expand & move down 2. Diaphragm contracts & moves down

  11. Exhalation 1. Lungs reduce in size 2. Diaphragm relaxes & moves up

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