part of part of immediately deep to innervated by innervated_by Homo sapiens transversus abdominis muscle http://upload.wikimedia.org/wikipedia/commons/3/32/Illu_trunk_muscles.jpg transversus abdominis transversalis transversus transversis abdominus transverse abdominus SCTID:244949003 FMA:15570 Behind the thorax, the lateral group (of muscles in reptiles and mammals) remains essentially as for amphibians. (It breaks into three sheet-like layers: external oblique muscle, the internal oblique, and the transversus). More anteriorly, however, the ribs, now enlarged, penetrate and alter this group of muscles. The transversus is excluded from the thorax and the external and internal obliques become, respectively, the external and internal intercostal muscles, which contribute to the new function of ventilation of the lungs.[well established][VHOG] MA:0002396 transversus abdominis NCIT:C53179 One of a pair of transverse abdominal muscles that is the anterolateral muscle of the abdomen, lying immediately under the internal abdominal oblique. [TFD][VHOG] transverse abdominal transverse abdominis transverse abdominal muscle The lateral abdominal wall muscle that is deep to the internal oblique. VHOG:0000845 Wikipedia:Transversus_abdominis_muscle EHDAA2:0002078 transversalis muscle UMLS:C0224378 transversus abdominus EHDAA:8254 musculus transversus abdominis transversus abdominus muscle EMAPA:18165 transverse abdominal UBERON:0001221 anterior abdominal wall muscle intercostal nerve abdominal internal oblique muscle anterior abdominal wall skeletal muscle organ, vertebrate