Final answer:
The thoracic cage protects organs in the thoracic cavity, including the heart and lungs, by enclosing them within a structure that also provides support and muscle attachment points.
Explanation:
The thoracic cage is the structure that protects the organs in the thoracic cavity, including the heart and lungs. It consists of ribs, sternum, thoracic vertebrae, and costal cartilages. Additionally, the thoracic cage provides support for the shoulder girdles and upper limbs, and serves as an attachment point for various muscles.
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