Wiktionary
n. 1 (context anatomy English) Layer of connective tissue covering the testis. 2 (context anatomy English) Layer of connective tissue covering the ovary. 3 (context anatomy English) Tough fibrous layer of connective tissue that surrounds the corpora cavernosa of the penis.
Wikipedia
Tunica albuginea may refer to:
- Tunica albuginea (penis), the tough fibrous layer of connective tissue that surrounds the corpora cavernosa of the penis
- Tunica albuginea (testicles), a layer of connective tissue covering the testicles
- Tunica albuginea (ovaries), the connective tissue covering of the ovaries
On the surface of the ovary this tissue is much condensed, and forms a layer, the tunica albuginea, composed of short connective-tissue fibers, with fusiform cells between them.
The tunica albuginea is the fibrous envelope of the corpora cavernosa penis. It consists of approximately 5% elastin, an extensible tissue that is primarily made up of the amino acids glycine, valine, alanine, and proline. The majority of the remaining tissue is collagen, which is made up of lysine, proline, glycine, alanine, and other amino acids.
The tunica albuginea is directly involved in maintaining an erection; that is due to Buck's fascia constricting the deep dorsal vein of the penis, preventing blood from leaving and thus sustaining the erect state.
The trabeculae of the tunica albuginea are more delicate, nearly uniform in size, and the meshes between them smaller than in the corpora cavernosa penis: their long diameters, for the most part, corresponding with that of the penis.
The external envelope or outer coat of the corpus spongiosum is formed partly of unstriped muscular fibers, and a layer of the same tissue immediately surrounds the canal of the urethra.