Penis Filet
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Penis Filet
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Synonyms:
Arteria pudendalis interna
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Author:
Jana Vasković MD
•
Reviewer:
Roberto Grujičić MD
Last reviewed: July 06, 2022
Reading time: 14 minutes
Honored everywhere from ancient statues and Renaissance paintings to modern-day graffiti, the human genitalia may be the most memorable human organs on the planet. However, there’s no piece of phallic art that can describe the penis as scientifically accurate as human anatomy can.
The penis is a copulatory organ of the external genitalia of the males . It consists of three parts ; root (radix), body (shaft) and glans. The core of the penis contains three erectile tissues, namely the two corpora cavernosa and the corpus spongiosum. Furthermore, the penis transmits the penile neurovascular bundle, as well as the terminal part of the urethra , which opens at its tip. Therefore, the penis is a meeting point between the urinary and reproductive systems , and its functions are defined within the spectrum of functions of these two systems;
This article will discuss the anatomy and functions of the penis.
The root of the penis is the most proximal part of the penis. It is located in the urogenital triangle of the perineum , where it is fixed to the pubic symphysis via the two suspensory ligaments of the penis. The root consists of the two muscles (ischiocavernosus and bulbospongiosus muscles) and proximal expansions of the erectile tissues; the two crura of penis and the bulb of penis.
The crura of penis are the proximal projections of the corpora cavernosa. The crura diverge laterally, with each crus attaching to the ipsilateral ischiopubic ramus.
The bulb of penis is a proximal expansion of the corpus spongiosum. It is located in the interval between the crura of penis, and is proximally continued by the bulbospongiosus muscle . The bulb is pierced by the penile urethra, which after passing through the bulb, continues through the entire length of the corpus spongiosum until reaching the tip of the glans.
The body of penis is the free pendulous part entirely enveloped in skin . Deep to the skin, there are three fasciae that envelop the contents of the penis. From superficial to deep, they are the superficial fascia of penis (dartos fascia of penis), deep fascia of penis (Buck’s fascia) and tunica albuginea.
The shaft of the penis contains three erectile tissues ; the two corpora cavernosa and the corpus spongiosum. These tissues extend through the entire body of penis. The corpora cavernosa lie one next to another in the dorsal compartment of the penis, while the corpus spongiosum lies in the ventral groove between them. In addition, the body of penis transmits the urethra and the penile neurovasculature.
The corpora cavernosa are the two erectile masses found within the dorsal part of the penis. Each begins within the root of penis as the crus of penis, traverses the shaft and terminates within the glans.
The corpora cavernosa are enveloped by the tunica albuginea , which is a layer of dense fibroelastic connective tissue . The tunica albuginea consists of an inner (circular) and an outer (longitudinal) fascial layer. Each corpus cavernosum is wrapped by its own circular layer, while a single longitudinal layer encloses them both. The circular layers form an incomplete fibrous septum between the adjoining sides of the corpora cavernosa. The ventral groove between the corpora cavernosa is occupied by the corpus spongiosum. The dorsal groove is traversed by the neurovascular bundle of penis which consists of the dorsal arteries of penis, dorsal veins of penis and the dorsal nerves of penis.
The corpora cavernosa contain a network of interconnected irregularly shaped sinusoid vascular spaces lined with endothelial cells. These sinusoid spaces are separated by the septae that pass from the tunica albuginea. The septae consist of the fibrous connective tissue rich with numerous smooth muscle cells .
Once filled with arterial blood from the helicine arteries, the cavernous sinuses compress the venous drainage from the penis, which manifests as the penile erection. The fibrous septum between the corpora cavernosa is incomplete proximally, allowing the blood exchange between the cavernous sinuses of the corpora.
The corpus spongiosum is a spongy mass of the erectile tissue found within the ventral compartment of the penis. It has a proximal dilation that projects into the root of penis, i.e. the bulb of penis. The corpus spongiosum features a distal bulbous expansion at the end of the penile shaft as well, which forms the glans penis . The glans shows a rounded base called the corona which demarcates it from the penile shaft. The glans is covered by the foreskin (prepuce), which is a double layer of loose retractable skin that attaches to the ventral surface of glans. The attaching site of the deep layer of the foreskin to the urethral surface lies under the corona and is called the frenulum .
The corpus spongiosum is enveloped by a thin layer of tunica albuginea and contains less erectile tissue than the corpora cavernosa. It is traversed by the penile urethra , which opens at the tip of the glans. The corona of glans contains many small preputial glands that secrete the sebaceous product called the smegma .
The penis is supplied by the internal pudendal artery , a branch of the internal iliac artery . This artery enters the penis via Alcock’s canal after which it divides into the perineal and common penile arteries. The former supplies the ischiocavernosus and bulbospongiosus muscles, while the common penile artery divides into three branches to supply the deep structures of the penis. These branches are the:
The venous drainage of the penis happens via one of the three systems;
The sensory innervation to the penis comes from a terminal branch of the pudendal nerve ; the dorsal nerve of penis . This nerve traverses the dorsal groove between the corpora cavernosa together with the same-named artery and vein. Along its course, it gives off many sensory branches that supply the skin of the penile shaft, as well as the prepuce of glans. The glans receives most of the sensory nerve endings, which is why it is the most sensitive area of the penis. The root of the penis receives the sensory innervation from the branches of the ilioinguinal nerve .
The autonomic innervation for the penis, both sympathetic and parasympathetic , comes from the pelvic plexus via the cavernous (deep/cavernosal) nerve .
Erection and ejaculaton are regulated by the autonomic innervation of the penis. The parasympathetic stimulation is excitatory for the penis, as it causes the erection . The parasympathetic stimuli relax the smooth musculature of the corpora cavernosa and produce vasodilation in the helicine arteries. The helicine arteries then fill the corpora cavernosa, compressing the venous outflow from the penis. This process is called the veno-occlusive mechanism and it results with penile erection.
On the other hand, the inhibitory sympathetic stimuli cause the ejaculation when the critical level of sexual excitement has been reached. The ejaculation process can be divided into two phases. In the first phase, the sympathetic stimuli cause the vasoconstriction of helicine arteries, contraction of the smooth muscle cells within the septa of corpus spongiosum and contraction seminal vesicles and prostate . This results in accumulation of seminal fluid into the proximal part of the urethra. During the second phase, the bulbospongiosus muscle contracts and expels the seminal fluid through the urethra ( ejaculation ). When the ejaculation is finished the penis returns into the flaccid state. An individual normally produces 3-5 ml of semen per one ejaculation which contains about 300 million sperm cells.
Learn more about the anatomy and function of the male reproductive system with our articles, video tutorials, quizzes and labeled diagrams.
Phimosis is a condition in which a person has difficulties to retract the prepuce (foreskin). It is recognized as a ring of foreskin around the tip of the glans. Phimosis is classified as physiological and pathological.
The treatment of pathological phimosis depends on its severity and conjoined complications. Usually there are three therapeutic approaches; smooth and gentle manual daily retraction, application of topical corticosteroids, or surgical circumcision.
Paraphimosis is a condition in which the retracted prepuce cannot be put back in its normal position. This often causes the swelling of the foreskin that can lead to the blockage of the blood flow in the glans. If not urgently treated this condition can lead to serious complications.Once surgically resolved, it does not require any further treatment.
Recurring paraphimosis is rare and it is an indication for circumcision.
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A copulatory organ of the external genitalia of males whose function is to enable the reproduction, sexual pleasure and micturition
Corpora cavernosa, corpus spongiosum, urethra
Bulbourethral artery, dorsal artery of penis, cavernous (deep/cavernosal) artery of penis;
Superficial dorsal, deep dorsal, circumflex, crural, and cavernous (deep/cavernosal) veins of penis
Sensory: Pudendal nerve (via dorsal nerve of penis)
Autonomic: Cavernous (deep/cavernosal) nerve of penis
An item not actually on the McDonald's restaurant's food menu. When one wishes to confuse, embarass , belittle, or otherwise make fun of a McDonald's employee, they are to order one large McPenis Filet. This item is normally ordered from the drive-thru menu, however, excessive confusion can be added by walking inside, gesturing up toward the menu above the employees as if the item is actually up on the menu, and then ordering the aforementioned McPenis Filet.
" Hello there , welcome to McDonald's! Can I take your order?"
"Yeah, give me a coke, small fry , and a McPenis Filet."
"Alright, that's a Coca-Cola, child's-size fry, and what was that last item?"
"A McPenis Filet...give me a big, juicy, McPenis Filet."
"I'm sorry, sir?"
Hilarity ensues .
Did you see the veins in that McPenis Filet?
In lamest terms, a term used to degrade someone such as the word asshole or bastard . Pretty much it could mean anything really.
" Dont gimme that shit. Your such a mcpenis filet ."
" NO! You are!"
by Reuben Fundillo November 12, 2004
From Wikipedia, the free encyclopedia
This article includes a list of general references , but it lacks sufficient corresponding inline citations . Please help to improve this article by introducing more precise citations. ( August 2011 ) ( Learn how and when to remove this template message )
^ Jump up to: a b Singer, Philip; Desole, Daniel E. (1967). "The Australian Subincision Ceremony Reconsidered: Vaginal Envy or Kangaroo Bifid Penis Envy" . American Anthropologist . 69 (3–4): 355–358. doi : 10.1525/aa.1967.69.3-4.02a00070 .
^ M Tractenberg (1999). Male and Female Circumcision . George C. Denniston, Frederick Mansfield Hodges, Marilyn Fayre Milos (editors). Springer Science & Business Media. p. 212. ISBN 9780306461316 .
^ Myerhoff 1982: 122
^ Ken Hale . "Damin" . Archived from the original on July 5, 2008 . Retrieved 2008-08-16 .
^ Andrew Arthur Abbie (1969). The Original Australians . London: Muller. p. 147. OCLC 640051856 .
Wikimedia Commons has media related to Penile subincision .
Penile subincision is a form of genital modification or mutilation consisting of a urethrotomy , in which the underside of the penis is incised and the urethra slit open lengthwise, from the urethral opening ( meatus ) toward the base. The slit can be of varying lengths.
Subincision was traditionally performed around the world, notably in Australia , but also in Africa , South America and the Polynesian and Melanesian cultures of the Pacific , often as a coming of age ritual.
Disadvantages include the risks inherent in the procedure itself, which is often self-performed , and increased susceptibility to sexually transmitted infections (STIs) . The ability to impregnate (specifically, getting sperm into the vagina ) may also be decreased. [ citation needed ]
Subincisions can greatly affect urination , often resulting in hypospadias requiring the subincised male to sit or squat while urinating. [1] The scrotum can be pulled up against the open urethra to quasi-complete the tube and allow an approximation to normal urination, while a few subincised men carry a tube with which they can aim. [ citation needed ]
Subincision (like circumcision ) is well documented [ citation needed ] among the peoples of the central desert of Australia such as the Arrernte and Luritja . The Arrernte word for subincision is arilta , and occurs as a rite of passage ritual for adolescent boys. [2] It was given to the Arrernte by Mangar-kunjer-kunja , a lizard-man spirit being from the Dreamtime . Some academics theorise that a subincised penis is thought to resemble a vulva , and the bleeding is likened to menstruation . [3] [1] This type of modification of the penis was also traditionally performed by the Lardil people of Mornington Island , Queensland . The young men who underwent the procedure were the only ones to learn a simple ceremonial language, Damin . In later ceremonies, repeated throughout adult life, the subincised penis would be used as a site for ritual bloodletting. According to Ken Hale , who studied Damin, no ritual initiations have been carried out in the Gulf of Carpentaria for half a century, and hence the language has also died out. [4]
Another indigenous Australian term for the custom is mika or the terrible rite . [5]
Indigenous cultures of the Amazon Basin also practise subincision, as do Samburu herdboys of Kenya , who are said to perform subincisions on themselves (or sometimes their peers) at age seven to ten. In Samoa , subincision of the foreskin, skin located along the tip of the penis, was ritually performed upon young men, as in Hawaii , where subincision of the foreskin is reported to have been performed at age six or seven. [ citation needed ]
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