Thorax 2

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Thorax 2

  1. 1. The thorax The thorax (or chest) is the region of the bodybetween the neck and the abdomenDivided into :-Thoracic wallThoracic cavity
  2. 2. Thoracic wall• Thoracic wall is formed by :- posteriorly by the thoracic part of the vertebral column anteriorly by the sternum and costal cartilages laterally by the ribs and intercostal spaces superiorly by the suprapleural membrane inferiorly by the diaphragm, which separates the thoracic cavity from the abdominal cavity• Covered from out side by muscles and skin
  3. 3. Sternum• The sternum lies in the midline of the anterior chest wall.• It is a flat bone that can be divided into three parts:• manubrium sterni,• body of the sternum,• xiphoid process
  4. 4. Ribs• There are 12 pairs of ribs, all of which are attached posteriorly to the thoracic vertebrae The ribs are divided into three categories :- True ribs: The upper seven pairs are attached anteriorly to the sternum by their costal cartilages False ribs: The 8th, 9th, and 10th pairs of ribs are attached anteriorly to each other and to the 7th rib by means of their costal cartilages and small synovial joints. Floating ribs: The 11th and 12th pairs have no anterior attachment
  5. 5. Thanks

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