Uterine Tubes

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The uterine tubes are also known as fallopian tubes. They are muscular tubes that transport the ovum from the ovary to the uterus. These tubes provide the site for fertilization. Histologically, the wall of the uterine tube consists of three main layers: the mucosa, muscularis, and serosa. The mucosa is highly folded, especially in the ampulla. The ampulla is the widest part. It is lined with a simple columnar epithelium. This epithelium contains two main cell types: ciliated cells and secretory (peg) cells. The ciliated cells move the ovum toward the uterus by beating in a coordinated manner. The peg cells secrete nutritive fluid, supporting sperm, ova, and early embryonic development.

Microscopic histology slide showing a uterine tube cross-section stained with eosin. The lumen appears as a central, irregular white space. Concentric layers of smooth muscle and connective tissue surround the lumen, with smaller blood vessels distributed throughout. Tissue is stained in varying intensity.
Figure 1: Microscopic view of a uterine tube cross-section showing tissue layers and a central lumen.

Beneath the mucosa is the muscularis. It is composed of an inner circular and outer longitudinal layer of smooth muscle. These layers contribute to peristaltic movements. These movements also help propel the ovum. The outermost layer is the serosa, a thin layer of connective tissue covered by mesothelium, part of the peritoneum.

Figure 1: Oviduct, H&E, 40X Slide 240-1
All by University of Michigan Histology, licensed under CC BY-NC-SA 3.0.

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