part of part of connected to rib vertebra zone of bone organ proximal segment of rib MA:0001400 The proximal rib derives from the caudal half of somite[PMID:15906248] proximal rib segment proximal part of rib The segment of the rib that connects to a vertebra[MP]. a small part of the rib composed of the head, neck, tuberculum and a short proximal part of the body[PMID]. vertebral part of rib UBERON:0010388 costal part of rib proximal rib