尿道海綿体
WordNet
- a collection of writings; "he edited the Hemingway corpus"
- the main part of an organ or other bodily structure
- duct through which urine is discharged in most mammals and which serves as the male genital duct
PrepTutorEJDIC
- (特定の事に関する,または特殊の性質の)文書資料の集成 / (研究用に収集した)資料
- 尿道
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/06/22 18:35:15」(JST)
[Wiki en表示]
| Corpus spongiosum penis |
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Lower Parts of the Genital and Urinary Tracts in the Male
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Dissection of the Penis
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| Details |
| Latin |
Corpus spongiosum penis
(plural: Corpora spongiosa penium),
(corpus cavernosum urethrae) |
| Identifiers |
| Gray's |
p.1248 |
Dorlands
/Elsevier |
c_56/12260814 |
| TA |
A09.4.01.015 |
| FMA |
19617 |
| Anatomical terminology |
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This article relies largely or entirely upon a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. (May 2015) |
The corpus spongiosum is the mass of spongy tissue surrounding the male urethra within the penis. Although called corpus cavernosum in older texts (reference title and dates needed) , this is not correct.
Contents
- 1 Anatomy
- 2 Function
- 3 Additional images
- 4 See also
- 5 References
- 6 External links
Anatomy
Behind, it is expanded to form the urethral bulb, and lies in apposition with the inferior fascia of the urogenital diaphragm, from which it receives a fibrous investment.
The urethra enters the bulb nearer to the superior than to the inferior surface. On the latter there is a median sulcus (groove), from which a thin fibrous septum (wall) projects into the substance of the bulb and divides it imperfectly into two lateral lobes or hemispheres.
The portion of the corpus spongiosum in front of the bulb lies in a groove on the under surface of the conjoined corpora cavernosa penis. It is cylindrical in form and tapers slightly from behind forward. Its anterior end is expanded in the form of an obtuse cone, flattened from above downward. This expansion, termed the glans penis, is moulded on the rounded ends of the corpora cavernosa penis, extending farther on their upper than on their lower surfaces.
At the summit of the glans is the slit-like vertical external urethral orifice, also known as the meatus.
The circumference of the base of the glans forms a rounded projecting border, the corona glandis, overhanging a deep retroglandular sulcus (Meiring's sulcus), behind which is the neck of the penis.
Function
The function of the corpus spongiosum in erection is to prevent the urethra from pinching closed, thereby maintaining the urethra as a viable channel for ejaculation. To do this, the corpus spongiosum remains pliable during erection while the corpora cavernosum penis becomes engorged with blood.
Additional images
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The penis in transverse section, showing the blood vessels.
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Diagram of the arteries of the penis.
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Vertical section of bladder, penis, and urethra.
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Transverse section of the penis.
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The constituent cavernous cylinders of the penis.
See also
- Corpus cavernosum penis
- Spongy urethra
References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
External links
- Anatomy photo:44:06-0204 at the SUNY Downstate Medical Center - "The Male Pelvis: The Urethra"
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Male reproductive system
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| Internal |
| Seminal tract |
| Testes |
- layers
- Tunica vaginalis
- Tunica albuginea
- Tunica vasculosa
- Appendix
- Mediastinum
- Lobules
- Septa
- Leydig cell
- Sertoli cell
- Blood–testis barrier
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| Spermatogenesis |
- Spermatogonium
- Spermatocytogenesis
- Spermatocyte
- Spermatidogenesis
- Spermatid
- Spermiogenesis
- Spermatozoon
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| Other |
- Seminiferous tubules
- Tubuli seminiferi recti
- Rete testis
- Efferent ducts
- Epididymis
- Paradidymis
- Spermatic cord
- Vas deferens
- Ejaculatory duct
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| Accessory glands |
- Seminal vesicles
- Prostate
- Urethral crest
- Seminal colliculus
- Prostatic utricle
- Ejaculatory duct
- Prostatic sinus
- Prostatic ducts
- Bulbourethral glands
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| External |
| Penis |
- root
- Crus
- Bulb
- Fundiform ligament
- Suspensory ligament
- body
- Corpus cavernosum
- Corpus spongiosum
- glans
- fascia
- Tunica albuginea
- Septum of the penis
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| Urinary tract |
- Internal urethral orifice
- Urethra
- Prostatic
- Intermediate
- Spongy
- Navicular fossa
- External urethral orifice
- Lacunae of Morgagni
- Urethral gland
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| Scrotum |
- layers
- skin
- Dartos
- External spermatic fascia
- Cremaster
- Cremasteric fascia
- Internal spermatic fascia
- Perineal raphe
- Scrotal septum
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Index of reproductive medicine
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| Description |
- Anatomy
- Physiology
- Development
- sex determination and differentiation
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| Disease |
- Infections
- Congenital
- Neoplasms and cancer
- male
- female
- gonadal
- germ cell
- Other
- Symptoms and signs
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| Treatment |
- Procedures
- Drugs
- benign prostatic hypertrophy
- erectile dysfunction and premature ejaculation
- sexual dysfunction
- infection
- hormones
- androgens
- estrogens
- progestogens
- GnRH
- prolactin
- Assisted reproduction
- Birth control
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UpToDate Contents
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English Journal
- Bulboprostatic anastomotic urethroplasty with preservation of potency: anatomical study, operative approach and clinical results.
- Al-Rifaei MA1, Zaghloul S, Al-Rifaei AM.
- Scandinavian journal of urology and nephrology.Scand J Urol Nephrol.2005;39(2):163-8.
- OBJECTIVE. To identify the precise anatomy of the membranous and bulbous urethrae and their relation to the neurovascular bundles (cavernous nerves and vessels). Based on the findings, a modified surgical technique was developed to preserve potency by avoiding injury to the neurovascular bundles dur
- PMID 16019772
- Radiographic appearance of the pars nuda urethrae in the voiding urethrogram.
- Stannard MW1, Currarino G.
- Abdominal imaging.Abdom Imaging.1993 Fall;18(4):393-5.
- The pars nuda is the most anterior segment of the male membranous urethra, extending from the urogenital diaphragm to the urethral bulb. It differs from adjacent urethral segments in being incompletely supported by corpus cavernosum and musculature. Usually, this part of the urethra is difficult to
- PMID 8220045
- [Construction of a neo-clitoris in male-to-female transsexuals].
- von Szalay L1.
- Handchirurgie, Mikrochirurgie, plastische Chirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft für Handchirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft für Mikrochirurgie der Peripheren Nerven und Gefässe : Organ der Vereinigung der Deutschen Plastischen Chirurgen.Handchir Mikrochir Plast Chir.1990 Sep;22(5):277-8.
- To preserve the ability of orgasm in male-to-female transsexuals we retain the glans-penis and the corpus cavernosum urethrae as a unit. The glans-penis will be placed into the anterior wall of the neo-vagina under the symphysis as the neo-clitoris.
- PMID 2227646
Japanese Journal
- <b>SCANNING ELECTRON MICROSCOPE OBSERVATION OF PENILE VASCULAR CASTS IN THE DOG: AN INQUIRY INTO THE POSSIBLE MECHANISM OF ERECTION BASED ON THE </b><b>FINDINGS </b>
- FINE ANGIOARCHITECTURES IN THE PENIS OF THE DOG
Related Links
- The two corpora cavernosa and corpus spongiosum (also known as the corpus cavernosum urethrae in older texts and in the diagram to the right) are three expandable erectile tissues along the length of the penis which fill with blood during ...
★リンクテーブル★
[★]
- ラ
- corpus spongiosum penis (Z), corpus cavernosum urethrae
- 関
- 陰茎、尿道海綿体、海綿体
[★]
海綿体
- 関
- cavernous body、sponge
[★]
- 関
- corpuscle