曲精細管
WordNet
- twist and press out of shape (同)deform, distort, wring
PrepTutorEJDIC
- (…で)〈物の形・意味など〉'を'ねじ曲げる,ゆがめる《+『名』+『with』+『名』》 / ゆがむ,ねじれる
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/06/08 17:08:40」(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 |
| TA |
A09.3.01.022 |
| FMA |
19825 |
| 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
|
|
| 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
- Polyglucosan Molecules Induce Mitochondrial Impairment and Apoptosis in Germ Cells Without Affecting the Integrity and Functionality of Sertoli Cells.
- Villarroel-Espíndola F1, Tapia C1, González-Stegmaier R2, Concha II1, Slebe JC1.
- Journal of cellular physiology.J Cell Physiol.2016 Oct;231(10):2142-52. doi: 10.1002/jcp.25315. Epub 2016 Feb 11.
- Glycogen is the main storage form of glucose; however, the accumulation of glycogen-like glucose polymers can lead to degeneration and cellular death. Previously, we reported that the accumulation of glycogen in testis of transgenic animals overexpressing a constitutively active form of glycogen syn
- PMID 26790645
- Di-(2-ethylhexyl) phthalate inhibits testosterone level through disturbed hypothalamic-pituitary-testis axis and ERK-mediated 5α-Reductase 2.
- Ha M1, Guan X2, Wei L2, Li P3, Yang M2, Liu C4.
- The Science of the total environment.Sci Total Environ.2016 Sep 1;563-564:566-75. doi: 10.1016/j.scitotenv.2016.04.145. Epub 2016 May 4.
- Di-(2-ethylhexyl) phthalate (DEHP) has reproductive toxicity and can affect male reproductive development. In order to clarify adverse effects of DEHP on testicular physiology and testosterone production, Sprague-Dawley (SD) rats were dosed daily with DEHP by gavage for 30days; TM3 cells (mouse Leyd
- PMID 27155079
- In vivo dynamics of GFRα1-positive spermatogonia stimulated by GDNF signals using a bead transplantation assay.
- Uchida A1, Kishi K1, Aiyama Y1, Miura K1, Takase HM2, Suzuki H2, Kanai-Azuma M2, Iwamori T3, Kurohmaru M1, Tsunekawa N1, Kanai Y4.
- Biochemical and biophysical research communications.Biochem Biophys Res Commun.2016 Aug 5;476(4):546-52. doi: 10.1016/j.bbrc.2016.05.160. Epub 2016 May 31.
- In mouse testes, spermatogonial stem cells (SSCs), a subpopulation of GFRα1 (GDNF family receptor-α1)-positive spermatogonia, are widely distributed along the convoluted seminiferous tubules. The proliferation and differentiation of the SSCs are regulated in part by local expression of GDNF (glial
- PMID 27255992
Japanese Journal
Related Links
- References for "Tubuli seminiferi contorti" online, at universities and in literature... cyclopaedia.net cyclopaedia.net Twittern Tubuli seminiferi contorti Ask Mr-Know-It-All Tubuli seminiferi contorti Seminiferous tubules are located in. ...
- Information about Tubuli seminiferi contorti in Free online English dictionary. What is Tubuli seminiferi contorti? Meaning of Tubuli seminiferi contorti medical term. What does Tubuli seminiferi contorti mean? Printer Friendly forum ...
★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。