Parietal Layer Of Tunica Vaginalis Testis
Tunica vaginalis testis; this is the Latin pronunciation for the Tunica Vaginalis. Tunica Vaginalis is the mesothelium lined serous membrane covering the testes. Tunica vaginalis is derived from processus vaginalis, which is derived from the peritoneal cavity when testes are descending from the abdomen into the scrotum in the fetus during the fetal period. The upper portion of tunica vaginalis closes during fetal period leading to the obliteration of upper portion while lower portion is divided into two layers surrounding testes: a visceral layer and a parietal layer.
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Parietal Layer Of Tunica Vaginalis Testis
PARIETAL LAMINA
Parietal Lamina (Lamina Parietalis) is much complicated than the Visceral layer. These layers upward to some distance in front and on the medial side of spermatic cord and reaches below to the testis. Of the two layers, parietal is outermost layer covering the visceral layer all around. Both layers consist of cuboidal epithelial cells. Parietal layer is externally supported by external spermatic fascia providing strength to the cavity.
CLINICAL ASPECTS
Although the complications of tunica vaginalis are not very common, still a common complication seen is hydroceles. It is the collection of fluid interior to the parietal layer in the cavity of tunica vaginalis.
A more painful condition is hematocele. It is the collection of blood inside the cavity.
Mesothelial cells may undergo cancerous development leading to mesothelioma of the membranes either parietal or visceral layer.
Very rarely the support of external spermatic fascia may be lost leading to obliteration of the cavity and protection and temperature regulation may get a little affected.
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