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The Structure of the Respiratory System
Transcript of The Structure of the Respiratory System
Epiglottis A Mucosal Lining protects the respiratory tree. The mucus itself traps airborne particles purifying the air passing through the cavities.
It also aids in warming the air The epiglottis covers the airway during swallowing so that food will only enter the esophagus Lower Respiratory Composed of
Lungs The trachea is the windpipe that connects the pharynx and larynx to the lungs. Trachea branches to left and right bronchi which lead into the lungs & finally to the alveolar sacs which bring oxygen into blood. The main function of the lungs are
breathing and pulmonary ventilation The bronchial tree consists of:
3. Alveoli Bronchi are formed at the lower part of the trachea. Bronchioles are smaller tube divisions of the bronchi.
Its walls contain smooth muscle and no cartilage.
This allows contraction and relaxation, thereby regulating air flow to the alveoli. Alveoli are tiny ends of the alveolar ducts.
Tiny air sacs that function to exchange oxygen and carbon dioxide in the blood.
Certain respiratory diseases cause a thickening of the alveoli walls, which restricts movement, causing breathing difficulties. Cilia(hairs) catch dust particles in the nose, nasal passsages, as well as the bronchis The larynx is the voice box:
Vocal Folds The pharynx (throat) is a hollow, tubular space that is lined with mucosa and skeletal muscles important for swallowing. Respiration: sequence of interrelated processes that bring Oxygen from the atmosphere into body cells and move Carbon Dioxide out of the body.
5 Distinct Activities
1. Pulmonary Ventilation
2. External Gas Exchange
3. Gas Transport
4. Internal Gas Exchange
5. Cellular Respiration Lobes
Oblique (L & R)
Horizontal (R Only)
Pleura Cavity Boyle Law's: Pressure and Volume of a gas are inversely proportional
In a closed space, if volume decreases, pressure increases & vis versa Henry's Law