Anatomy & Embryology
Narrowest part of fallopian tube is: (LQ)
a. Interstitial portion is the innermost part of the fallopian tube which traverses the myometrium to open into the endometrial cavity.
b. It is the shortest part of the tube, its length being the thickness of the uterine muscle, about 18 mm.
c. It is also the narrowest part,' its internal diameter being 1 mm or less.