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The Skeletal System

The Skeletal System. The Ribs and Sternum. Cartiage. 12 Pairs of ribs consisting of: flat bones cartilage give strength to the chest and permits it to expand. ** The ribs are curved and slightly twisted making them ideal to protect the chest area. Flat bone. The Ribs.

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The Skeletal System

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  1. The Skeletal System The Ribs and Sternum Cartiage • 12 Pairs of ribs consisting of: • flat bones • cartilage • give strength to the chest • and permits it to expand ** The ribs are curved and slightly twisted making them ideal to protect the chest area Flat bone

  2. The Ribs • All 12 ribs articulate with the 12 thoracic vertebrae posteriorly. • These ribs are divided into 3 parts: • The true ribs: • Ribs 1 to 7 (Upper 7 pairs) • Attaching both to the sternum and the vertebrae • The false ribs: • Ribs 8 to 10 (3 pairs) • Attaching to the sternum indirectly • The floating ribs • Ribs 11 and 12 (2 pairs) • Only attach to the vertebrae

  3. The Ribs Manubrium Sternum True Ribs (1-7) Xiphoid Process False Ribs (8 – 10) Costal Cartilages Floating Ribs (11 – 12)

  4. Sternum • Central bone of the chest • The clavicle and ribs 1 to 7 articulate with the sternum. Sternum – comprised of the manubrium, the sternum bodyand the xiphoid process

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