Costal margin

The costal margin is the lower edge of the chest (thorax) formed by the bottom edge of the rib cage.

Sometimes referred to as the costal arch, it is the medial margin formed by the false ribs and one true rib—specifically, from the seventh rib to the tenth rib.

单词	Arcus costalis
释义	Arcus costalis 英语百科 Costal margin The costal margin is the lower edge of the chest (thorax) formed by the bottom edge of the rib cage. Sometimes referred to as the costal arch, it is the medial margin formed by the false ribs and one true rib—specifically, from the seventh rib to the tenth rib.
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Arcus costalis

Costal margin