part of part of skeletal muscle of trunk FMA:58274 torso muscle organ muscle of trunk Note that this class excludes smooth muscle elements in the trunk region, such as the internal anal sphincter. This appears to be consistent with other ontologies such as FMA and ZFA which appear to only include skeletal muscles here. In fact the MA class 'trunk muscle' is classified as a 'set of skeletal muscles'. muscle organ of trunk muscle organ of torso Many ontologies do not appear to have a coherent distinction between an individual muscle and the musculature (i.e. the set of muscles in a region), so we group all together here. MA:0000514 UBERON:0001774 AAO:0000611 body musculature EMAPA:35888 TAO:0000473 A skeletal muscle organ that is part of the trunk region. trunk muscle trunk musculature trunk muscle organ ZFA:0000473 XAO:0003230 trunk musculature of trunk trunk region element skeletal muscle organ, vertebrate