File:Watson1918 plate03.jpg

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Plate 3

22 Transverse section through the bla(lder, arnpullae, and seminal vesicles in a human fetus 276 mm. crown—rump length, estimated age 31 Weeks (series no. 7). This is the same specimen shown in text figure 8.

23 Transverse section through colliculus seminalis (veruinontanum) in the same specimen shown in figure 22. The terminal openings of the ejaculatory ducts can be seen. The prostatic utricle has a bifurcated opening, being a remnant of the two fused Mullerian duets.

24 to 27 Transverse sections through the seminal apparatus in a human fetus at birth, crown-rump length 338 min. (series no. 8). This is the same specimen shown in text figure 9. Figure 24 is through the main part of the vesicles. Figure 25 shows the junction of the left vesicle and ampulla, on the right side they have not yet united. In figure 26 is one of the sacculations of the left seminal vesicle under higher magnification, showing the trabeculae traversing its lumen. Figure 27 is a transverse section through the colliculus serninalis showing the bifurcated character of the prostatiu utricle and the openings of the ejaculatory ducts and the collicular glands.

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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)
Links: fig 1 | fig 2 | fig 3 | fig 4 | fig 5 | fig 6 | fig 7 | fig 8 | fig 9 | plate 1 | plate 2 | plate 3 | Watson 1918 | Seminal Vesicle Development


Watson EM. The development of the seminal vesicles in man. (1918) Amer. J Anat. 24(4): 395 - 439.

Cite this page: Hill, M.A. (2024, February 26) Embryology Watson1918 plate03.jpg. Retrieved from

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