The Skeletal System The Ribs and Sternum Cartiage

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Presentation transcript:

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 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

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

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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