The anatomy of the thoracic cage provides ridged support and protection but at the same time is also flexible and mobile. Of the list below, which feature does NOT aid in the flexibility and movement of the thoracic cage?

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The jugular notch is a depression located at the superior margin of the sternum and does not aid in the flexibility and movement of the thoracic cage. The other options do participate in the mobility of the thoracic cage. The costal spaces occupied by costal muscle and the costal cartilages allow for movement during respiration, and the sternal angle allows for some degree of movement between the sternum and the clavicles.

The Anatomy of the Thoracic Cage Provides Ridged Support and Protection