what part of the skeleton protects your heart?

http://en.wikipedia.org/wiki/Human_rib_cage

It's the ribs.

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The part of the skeleton that protects your heart is the ribcage. The ribcage is a bony structure composed of twelve pairs of ribs that enclose and protect vital organs in your chest, including your heart and lungs.

To understand this, you can visualize the ribcage as a cage-like structure that surrounds the thoracic cavity of your body. The ribs extend from your spine at the back and curve towards the front, eventually connecting to the sternum (breastbone) in the center of the chest. This arrangement effectively creates a protective shield around your heart, shielding it from potential external impacts or injuries.

If you ever want to explore more about the human skeleton or various protective structures in the body, you can refer to anatomical textbooks, online educational resources, or consult with a knowledgeable healthcare professional.