The ribcage encompasses the chest and consists of the sternum (breastbone), the thoracic vertebrae, and the ribs. It forms a protective enclosure around vital organs such as the heart, lungs, and major blood vessels. The ribcage provides structural support to the upper body, helps maintain the shape and stability of the thoracic region, and plays a critical role in respiration. During breathing, the ribcage expands and contracts, allowing for the intake of oxygen and the expulsion of carbon dioxide. It also serves as an attachment point for various muscles involved in the movements of the chest, shoulders, and upper limbs.

英語での「ribcage」の定義と意味

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