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Definition of Tunica albuginea

Tunica albuginea: The whitish membrane within the penis that surrounds the spongy chambers (corpora cavernosa). The tunica albuginea helps to trap the blood in the corpora cavernosa, thereby sustaining erection of the penis.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=5867
Last Editorial Review: 3/19/2012

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