What structure extends off the ribs and attaches to the sternum?

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Multiple Choice

What structure extends off the ribs and attaches to the sternum?

Explanation:
Costal cartilage is the flexible hyaline cartilage that extends anteriorly from each rib and attaches to the sternum, forming the front part of the rib cage and allowing the chest to expand during breathing. The other options don’t fit: intercostal muscles are between the ribs, not the connection to the sternum; intervertebral discs are between vertebrae in the spine; the sternum is the bone that the cartilage attaches to, not the extending structure itself. So the structure that extends off the ribs and attaches to the sternum is costal cartilage.

Costal cartilage is the flexible hyaline cartilage that extends anteriorly from each rib and attaches to the sternum, forming the front part of the rib cage and allowing the chest to expand during breathing. The other options don’t fit: intercostal muscles are between the ribs, not the connection to the sternum; intervertebral discs are between vertebrae in the spine; the sternum is the bone that the cartilage attaches to, not the extending structure itself. So the structure that extends off the ribs and attaches to the sternum is costal cartilage.

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