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Axial Skeleton

Axial Skeleton. The Bony Thorax. The Bony Thorax. Includes sternum, ribs, and thoracic vertebrae Cage protects heart, lungs, and major blood vessels. The Bony Thorax - Sternum. Formed by fusion of three bones Manubrium is top heart-shaped structure, includes jugular notch

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Axial Skeleton

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  1. Axial Skeleton The Bony Thorax

  2. TheBonyThorax • Includes sternum, ribs, and thoracic vertebrae • Cage protects heart, lungs, and major blood vessels

  3. TheBonyThorax - Sternum • Formed by fusion of three bones • Manubrium is top heart-shaped structure, includes jugular notch • Body is middle elongated bone, fused with manubrium at Sternal Angle • Xiphoid Process is inferior tip, fused with body at Xiphisternal Joint

  4. TheBonyThorax - Sternum

  5. TheBonyThorax - Ribs • Twelve pairs of ribs form walls of thoracic cage • Two sections of ribs: • True ribs: first seven pairs, attached directly to sternum by costal cartilage • False ribs: next five pairs either attached to cartilage of superior ribs or not attached anteriorly(two pairs called floating ribs) • Intercostal spaces: between ribs, filled with muscles to aid in breathing

  6. TheBonyThorax - Ribs

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