Costal Cartilage

**Definition:** Bars of HYALINE CARTILAGE extending from the anterior ends of the upper RIBS. They attach to the STERNUM directly or indirectly by connecting to upper costal cartilage that attaches to the STERNUM. Costal cartilages extend the ribs anteriorly and contribute to the enhanced elasticity of the THORACIC WALL.

**Tree numbers:** - A02.165.407.325

**Synonyms:** - Sternal Cartilage