va de ▁the ▁other ▁components ▁of ▁the ▁dia ph rag m . ▁They ▁thus ▁give ▁rise ▁to ▁the ▁motor ▁and ▁sens ory ▁inner v ation ▁of ▁the ▁mus cular ▁dia ph rag m ▁by ▁the ▁phr en ic ▁n erve . ▁ ▁Der iv atives ▁ ▁The ▁c ran ial ▁part ▁of ▁the ▁sept um ▁trans vers um ▁gives ▁rise ▁to ▁the ▁central ▁tend on ▁of ▁the ▁dia ph rag m ▁and ▁is ▁the ▁origin ▁of ▁the ▁my ob last s ▁that ▁in va de ▁the ▁ple uro per it one al ▁fol ds ▁resulting ▁in ▁the ▁formation ▁of ▁the ▁mus cular ▁dia ph rag m . ▁ ▁The ▁ca ud al ▁part ▁of ▁the ▁sept um ▁trans vers um ▁is ▁inv aded ▁by ▁the ▁he p atic ▁di vert icul um ▁which ▁div ides ▁within ▁it ▁to ▁form ▁the ▁li ver ▁and ▁thus ▁gives ▁rise ▁to ▁the ▁vent ral ▁m esent ery ▁of ▁the ▁for eg ut , ▁which ▁in ▁turn ▁is ▁the ▁prec ursor ▁of ▁the ▁less er ▁o ment um , ▁the ▁vis cer al ▁per it one um ▁of ▁the ▁li ver ▁and ▁the ▁fal c iform ▁lig ament . ▁ ▁Though ▁not ▁derived ▁from ▁the ▁sept um ▁trans vers um , ▁development ▁of ▁the ▁li ver ▁is ▁highly ▁dependent ▁upon ▁signals ▁origin ating ▁here . ▁ ▁B one ▁morph ogen etic ▁protein ▁ 2 ▁( B MP - 2 ), ▁B MP - 4 ▁and ▁B MP - 7 ▁produced ▁from ▁the ▁sept um ▁trans vers um ▁join