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Explain the histology of fallopian tubes.

User Luis Valle
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Final answer:

The fallopian tubes or uterine tubes serve as the passage for the oocyte from the ovary to the uterus. They are composed of segmented parts and lined with layers of specific types of cells which aid in the movement of the egg. Fertilization most often occurs within these tubes.

Step-by-step explanation:

The uterine tubes, also known as fallopian tubes or oviducts, function as the conduit for the oocyte (egg cell) from the ovary to the uterus. Each of the two uterine tubes is near but not directly linked to the ovary, and is divided into sections: the isthmus (narrow medial end connected to the uterus), the ampulla (middle region where fertilization often transpires), and the distal infundibulum with fimbriae (slender, finger-like projections that help the egg enter the tube).

The tubal walls are composed of three layers: an outer serosa, a middle layer of smooth muscle, and an inner mucosal layer. The latter, in addition to its mucus-secreting cells, has ciliated cells that create current towards the uterus, an essential process for moving the oocyte.

The process of an egg, or oocyte, traveling through the fallopian tube towards the uterus is regulated by the beating of cilia and the contraction of the smooth muscle of the tubal walls. This journey typically takes a week, with fertilization usually taking place within the tube.

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