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Gross Anatomy of the Thorax

Gross Anatomy of the Thorax. Part II: The Lungs and Mediastinum. Pleura. Serous Membrane Produces fluid that allows for lubrication Attaches lung to inner surface of thoracic cage Failure to function results in difficult painful breathing. Pleura. Parietal Pleura Visceral Pleura

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Gross Anatomy of the Thorax

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  1. Gross Anatomy of the Thorax Part II: The Lungs and Mediastinum

  2. Pleura • Serous Membrane • Produces fluid that allows for lubrication • Attaches lung to inner surface of thoracic cage • Failure to function results in difficult painful breathing

  3. Pleura • Parietal Pleura • Visceral Pleura • Pleural Space

  4. Mediastinum • Behind Sternum • Mediastinum borders are: • Lateral • Posterior • Anterior • Inferior

  5. Structures • Heart • Trachea • Great Vessels • Thymus Gland • Nerves • Lymph Nodes & Vessels

  6. Hilum • Opening on the medial surface of the lungs • Contains: • Mainstem bronchi • Blood vessels • Lymphatics • nerves

  7. Lungs • Pair of Cone-shaped organs • Lie in pleural cavity • Weigh approx 800g • 90% air • 10% tissue • Left lung is narrower • Right lung is shorter

  8. Lungs • Apices-extend 1-2 cm past clavicles • At end-expiration • 6th rib – midclavicular • 8th rib – laterally • Posteriorly • Tops is at 1st vertebra • Inferior border • Rises & falls betwee 9th & 12th rib

  9. Lungs • Each lung is divided into: • Lobes: major divisions of the lungs • Divided by fissures: narrow clefts or slits • Segments: minor divisions of the lungs • Secondary lobules: minor divisions of segments

  10. Lungs

  11. Bronchopulmonary Segments

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