Which portion of the fallopian tube is adjacent to the uterine wall and is short and narrow?

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Multiple Choice

Which portion of the fallopian tube is adjacent to the uterine wall and is short and narrow?

Explanation:
The part of the fallopian tube that lies right next to the uterine wall and is short and narrow is the isthmus. This segment acts as the relatively straight, proximal conduit between the uterus and the more distal portions. It has a narrow lumen and a thicker muscular wall, making it the portion that’s closely apposed to the uterus. In contrast, the infundibulum is the funnel-shaped end near the ovary with fimbriae, the ampulla is the wider midsection where fertilization often occurs, and the interstitial (intramural) portion actually travels within the myometrium to open into the uterine cavity. Thus, the description best fits the isthmus.

The part of the fallopian tube that lies right next to the uterine wall and is short and narrow is the isthmus. This segment acts as the relatively straight, proximal conduit between the uterus and the more distal portions. It has a narrow lumen and a thicker muscular wall, making it the portion that’s closely apposed to the uterus. In contrast, the infundibulum is the funnel-shaped end near the ovary with fimbriae, the ampulla is the wider midsection where fertilization often occurs, and the interstitial (intramural) portion actually travels within the myometrium to open into the uterine cavity. Thus, the description best fits the isthmus.

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