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Erectile tissue is tissue in the body with numerous vascular spaces, or cavernous tissue, that may become engorged with blood. [1] [2] However, tissue that is devoid of or otherwise lacking erectile tissue (such as the labia minora, vestibule, vagina and urethra) may also be described as engorging with blood, often with regard to sexual arousal.
A corpus cavernosum penis (singular) (from Latin, characterised by "cavities/ hollows" [2] of the penis, pl.: corpora cavernosa) is one of a pair of sponge-like regions of erectile tissue, which contain most of the blood in the penis of several animals during an erection.
Each crus represents the tapering, posterior fourth of each corpora cavernosa penis; the two corpora cavernosa are situated alongside each other along the length of the body of penis while the two crura diverge laterally in the root of penis before attaching firmly onto either ischial ramus at their proximal end.
cc. Corpus cavernosum clitoridis: cp. Corpus cavernosum penis cut short ug. Sinus urogenitalis: C. Greater vestibular gland, and immediately above it the urethra: C. Bulbourethral gland of one side f. Abdominal opening of the left uterine tube: g. Round ligament, corresponding to gubernaculum: g. Gubernaculum: h. Situation of the hymen: m, m.
The corpora cavernosa are innervated by lesser and greater cavernous nerves and form most of the penis containing blood vessels that fill with blood to help make an erection. [8] The crura are the proximal parts of the corpora cavernosa. The corpus spongiosum is an erectile tissue surrounding the urethra.
In human male anatomy, the radix (/ r eɪ. d ɪ k s /) [1] or root of the penis is the internal and most proximal portion of the human penis that lies in the perineum.Unlike the pendulous body of the penis, which is suspended from the pubic symphysis, the root is attached to the pubic arch of the pelvis and is not visible externally.
Diagram of the arteries of the penis and its glans The glans penis as the expansion of the corpus spongiosum. The glans penis is a body of spongy erectile tissue that is moulded on the rounded ends of the two corpora cavernosa penis, [9] extending farther on their upper than on their lower surfaces.
The body or shaft of the penis is the free portion of the human penis that is located outside of the pelvic cavity. [1] It is the continuation of the internal root, which is embedded in the pelvis and extends to the glans. [2] It is made up of the two corpora cavernosa and the corpus spongiosum on the underside.