Tunica vaginalis

Tunica vaginalis

Infobox Anatomy
Name = PAGENAME
Latin = tunica vaginalis testis
GraySubject = 258
GrayPage = 1242


Caption = The right testis, exposed by laying open the tunica vaginalis. (Tunica vaginalis is labeled at upper right.)


Caption2 = Varieties of oblique inguinal hernia.
Precursor = Processus vaginalis
System =
Artery =
Vein =
Nerve =
Lymph =
MeshName =
MeshNumber =
DorlandsPre = t_22
DorlandsSuf = 12832403

The tunica vaginalis is the serous covering of the testis.

It is a pouch of serous membrane, derived from the saccus vaginalis of the peritoneum, which in the fetus preceded the descent of the testis from the abdomen into the scrotum.

After its descent, that portion of the pouch which extends from the abdominal inguinal ring to near the upper part of the gland becomes obliterated; the lower portion remains as a shut sac, which invests the surface of the testis, and is reflected on to the internal surface of the scrotum; hence it may be described as consisting of a visceral and a parietal lamina.

Visceral lamina

The visceral lamina (lamina visceralis) covers the greater part of the testis and epididymis, connecting the latter to the testis by means of a distinct fold.

From the posterior border of the gland it is reflected on to the internal surface of the scrotum.

Parietal lamina

The parietal lamina (lamina parietalis) is far more extensive than the visceral, extending upward for some distance in front and on the medial side of the cord, and reaching below the testis.

The inner surface of the tunica vaginalis is smooth, and covered by a layer of simple cuboidal endothelial cells.

The interval between the visceral and parietal laminæ constitutes the cavity of the tunica vaginalis.


=Additional

External links

* [http://www.aspiruslibrary.org/pictures/grey/prostate.gifDiagram at aspiruslibrary.org]
* [http://www.wisc.edu/ansci_repro/lab/lab2/images2002/vtv.jpgPhoto] at University of Wisconsin
* - "Inguinal Region, Scrotum and Testes: Tunic"
*
* (NormanAnatomyFig|testes)


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  • tunica vaginalis — tunica va·gi·na·lis .vaj ə nā ləs, nal əs n, pl tunicae va·gi·na·les nā (.)lez, nal (.)ēz a pouch of serous membrane covering the testis and derived from the peritoneum …   Medical dictionary

  • tunica vaginalis — ˌvajəˈnalə̇s, nā noun (plural tunicae vaginales a(ˌ)lēz, ā(ˌ)lēz) Etymology: New Latin, vaginal coat : a pouch of serous membrane covering the testis and derived from the peritoneum …   Useful english dictionary

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  • vaginalis — see PROCESSUS VAGINALIS, TUNICA VAGINALIS …   Medical dictionary

  • parietal layer of tunica vaginalis of testis — lamina parietalis tunicae vaginalis testis …   Medical dictionary

  • visceral layer of tunica vaginalis of testis — lamina visceralis tunicae vaginalis testis …   Medical dictionary

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