Assertion: fallopian tube's layer | /r/AtLocation | the isthmus
Facets:
Source sentences:
text: An inner longitudinal layer is present in the isthmus and the intramural part (see below) of the oviduct.
text: An inner, longitudinal layer of muscle is present in the isthmus and the last, intramural part of the oviduct, which penetrates the wall of the uterus.