develops from develops from composed primarily of Homo sapiens metacarpal bone bone tissue metacarpal bone of digit 1 1 finger 1 metacarpus hand digit 1 metacarpal FMA:23899 metacarpal 1 NCIT:C52796 metacarpal of thumb thumb metacarpal UMLS:C1708987 manual digit 1 metacarpus A metacarpal bone that distally_connected_to a proximal phalanx of manual digit 1. metacarpal bone of first digit of hand first digit of hand metacarpal metacarpal bone of thumb hand digit 1 metacarpal bone metacarpal bone of digit I UBERON:0003645 EMAPA:19112 metacarpal I forelimb digit 1 metacarpus The first metacarpal bone or the metacarpal bone of the thumb is the first bone of the thumb. It is connected to the trapezium of the carpus at the first carpometacarpal joint and to the proximal thumb phalanx at the first metacarpophalangeal joint[Wikipedia:First_metacarpal_bone]. metacarpal of hand digit 1 MA:0001364 first metacarpal bone thumb metacarpal bone metacarpal bone of hand digit 1 AAO:0010616 SCTID:181973009 first digit of hand metacarpal bone metacarpal of first digit of hand metacarpal bone digit 1 manual digit 1 metacarpus cartilage element metapodium bone 1 manual digit 1 metacarpus endochondral element