Sternum and Ribs Thorax

False Ribs

"Vertebrochondral" Ribs Attach to sternum indirectly or not at all. Ribs 8-10 attach to sternum indirectly decreases in length

True Ribs (7)

"Vertebrosternal" Increases in length Attach directly to sternum

Typical "True" Rib parts

1. Head of Rib 2. Neck of Rib 3. Tubercle of Rib 4. Shaft 5. Articular Facets 6. Coastal Groove

Ribs

12 Pairs : (7) True ribs (5) False ribs

Sternum (1)

Lies in the anterior midline. The breast bone that looks like a dagger. 1. Jugular notch "Suprasternal Notch" 2. Clavicle Notches "Collarbone location" 3. Manubrium "Knife Handle" 4. Sternal angle "allowing body to inhale" 5. Body "Bulk of the sternum: 6. Xphoid process "Sword like"

Floating ribs

Ribs 11-12 No anterior attachment Lie embedded in the muscles of lateral body wall

Inferior Coastal Margin

Ribs 7-10 Diverge from Xiphisternal joint where they form infrasternal angle. (Goes down)