costal arch


costal margin

[TA] that portion of the inferior aperture of the thorax formed by the articulated cartilages of the seventh to tenth (that is, false) ribs. Synonym(s): arcus costalis [TA], costal arch ☆ , arcus costarum

cos·tal arch

(kos'tăl ahrch) That portion of the inferior aperture of the thorax formed by the articulated cartilages of the seventh to tenth (false) ribs.