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The Respiratory System
The Respiratory System
The Respiratory System
The Respiratory System
The Respiratory System
The Respiratory System
The Respiratory System
The Respiratory System
The Respiratory System
The Respiratory System
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The Respiratory System

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  • 1. The Respiratory System Ms. Bennett’s Living Environment A Study Guide
  • 2. The Purpose of the Respiratory System <ul><li>In with the good, out with the bad </li></ul>
  • 3. The Parts of the Respiratory System
  • 4. Nasal Cavity and Nasal Passages <ul><li>Air enters through nostrils and mouth </li></ul><ul><li>Passages lined with cilia and mucous membranes </li></ul><ul><li>Cilia filters air </li></ul><ul><li>Mucous membranes warm the air </li></ul>
  • 5. Pharynx and Larynx <ul><li>Houses the glottis-opening to the trachea </li></ul><ul><li>The epiglottis is a flap that covers the glottis during swallowing to prevent food from going down the trachea </li></ul><ul><li>Voice box- allows you to speak </li></ul>
  • 6. Trachea <ul><li>Kept open by rings of cartilage </li></ul><ul><li>Trachea divides into two branches called bronchi </li></ul><ul><li>Cilia beat in one direction to get foreign particles out </li></ul>
  • 7. Bronchi and Bronchioles <ul><li>Lined with cilia and mucous membranes </li></ul><ul><li>Bronchioles are branches off of the bronchi </li></ul><ul><li>Bronchioles continue to divide, ending in alveoli </li></ul>
  • 8. Alveoli <ul><li>Responsible for gas exchange (O2, CO2) </li></ul><ul><li>Increase the surface area of the lungs </li></ul><ul><li>Tiny air sacs surrounded by capillaries </li></ul><ul><li>Double Diffusion </li></ul>
  • 9. Lungs <ul><li>Made up of bronchus, bronchioles, and alveoli </li></ul><ul><li>Air enters and leaves lungs due to changes in air pressure causes by the expansion and contraction of your diaphragm </li></ul><ul><li>Lung Machine: Diaphragm moves up and down creating unequal pressure in the chest cavity. This allows inhalation and exhalation to occur. </li></ul>
  • 10. Diaphragm <ul><li>Inhale - diaphragm moves down as air is forced into your lungs </li></ul><ul><li>Exhale - diaphragm moves up to its original curved position which forces air out of the lungs </li></ul>

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