rib GAID:245 MA:0000315 Endochondral, rodlike element that articulates with the transverse process and parapophysis (double-headed rib), or with the transverse process only (single-headed rib); it extends into the body wall and provides a site for muscle attachment.[AAO] NCIT:C12782 OpenCyc:Mx4rvVjNoZwpEbGdrcN5Y29ycA MESH:D012272 EMAPA:18010 UBERON:0002228 UMLS:C0035561 In most vertebrates, ribs surround the chest. In some species, especially snakes, ribs may provide support and protection for the entire body pleural rib ribs An intersegmental rod-shaped bone that forms in the peritoneal membrane and attach to the vertebral parapophyses. uberon They protect and support internal organs and enable lungs to expand by expanding the chest. CALOHA:TS-2209 FMA:7574 ZFA:0000538 dorsal rib Endochondral bone that is intersegmental and rod-shaped, forming in the peritoneal membrane and attached to the vertebral parapophyses. Ribs protect and support internal organs.[TAO] galen:Rib AAO:0000545 EFO:0003066 VHOG:0001154 costal TAO:0000538 endochondral bone rib endochondral element