part of part_of part of part_of dorsum subdivision of trunk dorsal trunk EMAPA:35162 FMA:25056 In humans, the subdivision of trunk which is demarcated from the trunk proper by the external surface of the posterolateral part of the rib cage, the anterior surface of the thoracic vertebral column and the posterior axillary lines, the external surface of the posterior abdominal wall; together with the trunk proper, it constitutes the trunk[FMA] MA:0000020 The part of the trunk that is in the dorsum[cjm]. UBERON:0011270 back of trunk dorsal part of trunk dorsum of trunk trunk back uberon