曲精細管
WordNet
- a small tube
- rolled longitudinally upon itself; "a convolute petal" (同)convoluted
- bearing or producing seed or semen; "seminiferous tubules"
PrepTutorEJDIC
- 小管,細管
- 《まれ》=convoluted
- 《文》回旋状の,渦(うず)往き形の / 複雑に入り組んだ;回りくどい
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/04/11 16:52:03」(JST)
[Wiki en表示]
| Seminiferous tubule |
|
Seminiferous tubule in cross-section (large tubular structure - center of image) with sperm (black, tiny, ovoid bodies furthest from the outer edge of the tubular structure). H&E stain.
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1: Testicular septa
2: Convoluted seminiferous tubules
3: Testicular lobules
4: Straight seminiferous tubules
5: Efferent ductules
6: Rete testis |
| Details |
| Latin |
tubuli seminiferi |
| Identifiers |
| Gray's |
p.1243 |
| MeSH |
A05.360.444.849.700 |
| Anatomical terminology |
Seminiferous tubules are located within the testes, and are the specific location of meiosis, and the subsequent creation of gametes, namely spermatozoa.
The epithelium of the tubule consists of sustentacular or Sertoli cells, which are tall, columnar type cells that line the tubule.
In between the Sertoli cells are spermatogenic cells, which differentiate through meiosis to sperm cells. Sertoli cells function to nourish the developing sperm cells. They secrete testosterone binding protein, which increases the concentration of testosterone inside the seminiferous tubules. Embryologically, they also secrete the Anti-Mulleran Factor necessary for the female mulleran ducts to regress.
There are two types: convoluted and straight, convoluted toward the lateral side, and straight as the tubule comes medially to form ducts that will exit the testis.
The seminiferous tubules are formed from primitive sex cords. It is the medullary cords which develop into the seminiferous tubules and the cortical cords regress. The cords were formed from the gonadal ridge.
Additional images
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Seminiferous tubule (right) with sperm (black, tiny, ovoid). H&E stain.
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Transverse section through the left side of the scrotum and the left testis (Semeniferous tubules visible in center, but not labeled).
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Microscopic shot of seminiferous tubule (cross section).
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Photomicrograph of rat testis.
See also
External links
- Histology image: 17802loa — Histology Learning System at Boston University
- Image
- Diagram
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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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|
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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
- Nuclear Brachyury Expression Is Consistent in Chordoma, Common in Germ Cell Tumors and Small Cell Carcinomas, and Rare in Other Carcinomas and Sarcomas: An Immunohistochemical Study of 5229 Cases.
- Miettinen M1, Wang Z, Lasota J, Heery C, Schlom J, Palena C.
- The American journal of surgical pathology.Am J Surg Pathol.2015 Oct;39(10):1305-12. doi: 10.1097/PAS.0000000000000462.
- Brachyury is a transcription factor of the T-box family typically expressed in notochord and chordoma. Some studies report brachyury as highly specific for chordoma, whereas others have concluded that brachyury is expressed in many types of common carcinomas by reverse transcription polymerase chain
- PMID 26099010
- Testis Morphometry and Stages of the Seminiferous Epithelium Cycle in an Epididymal Sperm-storing Neotropical Vespertilionid, Myotis levis (Chiroptera).
- Farias TO1, Notini AA1, Talamoni SA1, Godinho HP1.
- Anatomia, histologia, embryologia.Anat Histol Embryol.2015 Oct;44(5):361-9. doi: 10.1111/ahe.12148. Epub 2014 Sep 24.
- Yellowish myotis, Myotis levis, is a seasonal, epididymal sperm-storing Neotropical vespertilionid. In the dry season, males show simultaneous testis regression and sperm storage in cauda epididymis, enabling them to mate during this season. In this study, we investigated seasonal variations in body
- PMID 25258091
- Anti-Müllerian Hormone Is a Marker for Chemotherapy-Induced Testicular Toxicity.
- Levi M1, Hasky N1, Stemmer SM1, Shalgi R1, Ben-Aharon I1.
- Endocrinology.Endocrinology.2015 Oct;156(10):3818-27. doi: 10.1210/en.2015-1310. Epub 2015 Aug 7.
- Due to increased numbers of young cancer patients and improved survival, the impact of anticancer treatments on fertility has become a major health concern. Despite mounting research on ovarian toxicity, there is paucity of data regarding reliable biomarkers of testicular toxicity. Our aim was to ev
- PMID 26252060
Japanese Journal
- The Localization of Aldolase Isozymes in Various Organs of Rat by Using Immunohistochemical Technique
- Yamamoto Noboru,Yasuda Kenjiro
- 北里医学 10(6), 385-394, 1980-12-31
- … In kidney : Aldolase A was predominantly localized in the glomerulus and slightly observed in the proximal convoluted tubule. … Aldolase B was mainly present in the proximal convoluted tubule. …
- NAID 110004691320
- A CASE OF SEMINOMA ACCOMPANIED BY THE UNDESCENDED TESTICLE IN THE LEFT INGUINAL REGION
- 佐多 祐策,森田 俊夫
- 昭和医学会雑誌 11(4), 197-199,233, 1951
- … However, at that time, it was reported as a testicular tumour of large cells, This denomination by Chevassu was based on the theory that this tumour is originated from the epithelium of the convoluted seminiferous tubules. …
- NAID 130001820097
Related Links
- seminiferous tubule n. One of two or three twisted, curved tubules in each lobule of the testis in which spermatozoa develop. seminif′erous tu′bule n. any of the coiled tubules of the testis in which spermatozoa are produced. [1855–60] ...
- convoluted seminiferous tubules the long threadlike tubes in the areolar tissue of the testes. The testes also contain straight segments of seminiferous tubules. ... Disclaimer All content on this website, including dictionary ...
★リンクテーブル★
[★]
- 英
- convoluted seminiferous tubule (Z), convoluted seminiferous tubules
- ラ
- tubuli seminiferi contorti
- 同
- 精細管、直精細管
- 直精細管と対比させる場合に用いられる呼称と思われる (HIS.414)
- 蛇行し密集している精細管を指す。
[★]
- 関
- canaliculi、canaliculus、kidney tubule、renal tubular、renal tubule、tubular、uriniferous tubule
[★]
- 関
- convolution、rotation、rotatory、swirling