A 17-year-old girl with a history of pelvic inflammatory disease presents at the emergency department with severe pain in her lower right side that came on fairly quickly. Upon questioning she replies that her last menstrual period was 6 weeks ago and that she has never missed a period before. The doctor suspects she has an ectopic pregnancy and this is quickly confirmed by ultrasound testing. The surgeon removes her right uterine tube that is inflamed, scarified, and contains the implanted embryonic tissue in the region where fertilization normally occurs. Where is this?a. The uterine part of the oviductb. The ampulla region with highly folded mucosac. The only oviduct region attached to the mesosalpinxd. The infundibulum region with fimbriaee. The isthmus region

b. The ampulla region with highly folded mucosa.

Explanation:

The uterine tubes are two structures that transport the oocyte from the ovary to the uterus. It has four regions, starting with the one closer to the ovaries they are:

Fimbriae: they are ciliated projections that once the ovary releases the oocyte, they capture it and guide it to the interior of the uterine tube.

Infundibulum: this is the portion of the uterine tube that takes the oocyte. It has a conic shape.

Ampulla: It is the region that follows after the infundibulum. It is the longest segment of the ovary ducts, and it is where the sperm meets the oocyte, in other words, where fertilization occurs. The mucosa lining in this area has primary, secondary, and tertiary mucosa folds. They have cells that provide nutrients to the egg and move it towards the uterus.

Isthmus: It is the last part of the uterine tubes. It connects the ampulla to the uterus, and its function is to deliver the eggs to the uterus. The mucosa has fewer folds.

The doctor removed the uterine tube because, even though the fertilization happens in the ampulla of this organ, the fertilized egg then has to move to the uterus to keep its development.

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