from The Century Dictionary.
- noun In anatomy, a name (properly tunica albuginea) applied to several membranes: To the fibrous covering of the testis beneath the tunica vaginalis (sheathing membrane);
- noun to the similar fibrous covering of the ovary beneath the peritoneum;
- noun to the sclerotic or white of the eye.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun anatomy A layer of white,
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun whitish tunic
Sorry, no etymologies found.
Well, she is a little under-exposed to public opinion, what with her head firmly lodged somewhere between every other woman's internal os and tunica albuginea.
In relation to the testicle, the posterior part will be seen to be reflected over the body of the gland as the tunica albuginea, while the anterior part blends with the cellular tissue of the front wall of the scrotum.
When the serous canal contracts and degenerates to the form of a simple cord, it leaves the fibrous canal still continuous above with the fibrous membrane (transversalis fascia) of the abdomen, and below with the fibrous envelope (tunica albuginea) of the testis; and at the adult period, this fibrous canal is known as the internal spermatic sheath, or infundibuliform fascia enclosing the remains of the serous canal, together with the spermatic vessels, &c.
The two coverings of fibro-serous structure which surrounded the testis in the loins become respectively the tunica albuginea and tunica vaginalis when the gland occupies the scrotal cavity.
The fibroelastic coat (tunica albuginea) invests the organ, and at the hilum is reflected inward upon the vessels in the form of sheaths.
Two or three of these accompany the ductus deferens, and supply the epididymis, anastomosing with the artery of the ductus deferens; others pierce the back part of the tunica albuginea, and supply the substance of the testis.
On the surface of the organ this tissue is much condensed, and forms a layer (tunica albuginea) composed of short connective-tissue fibers, with fusiform cells between them.
It clothes the inner surface of the tunica albuginea and the different septa in the interior of the gland, and therefore forms an internal investment to all the spaces of which the gland is composed.
The surface epithelium ultimately forms the permanent epithelial covering of this organ; it soon loses its connection with the central mass, and a tunica albuginea develops between them.
The testis has a rich superficial plexus beneath the tunica albuginea.