Cavernous sinus

…The corpus cavernosum is surrounded by a thick connective tissue membrane called the tunica albuginea, which occupies a large part of the penis, but there is a septum between them, which incompletely divides the corpus cavernosum into left and right. The corpus cavernosum is made up of a network of trabeculae and the spaces between them called cavernous sinuses, and is spongy. The cavernous sinuses are irregularly shaped venous cavities that contain blood, which, when filled, causes an erection of the penis. …

*Some of the terms that refer to "cavernous sinus" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…陰茎海綿体は白膜とよばれる厚い結合組織性の被膜に包まれ，左右にまたがる大きい部分を占めるが，その間に中隔が存し，海綿体を不完全に左右に分けている。海綿体は網状の小柱と，その空隙である海綿体洞からなり，海綿様である。海綿体洞は不規則な形の静脈腔で血液を含むが，これが充満すれば陰茎の勃起となる。…

※「海綿体洞」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報