seminiferous tubule

精細管

WordNet

1. a small tube
2. bearing or producing seed or semen; "seminiferous tubules"

PrepTutorEJDIC

1. 小管,細管

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/07/22 13:10:58」(JST)

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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.
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

• Seminiferous tubule (right) with sperm (black, tiny, ovoid). H&E stain.

• Transverse section through the left side of the scrotum and the left testis (Semeniferous tubules visible in center, but not labeled).

• Microscopic shot of seminiferous tubule (cross section).

• Photomicrograph of rat testis.

See also

• Leydig cells

External links

• Histology image: 17802loa – Histology Learning System at Boston University
• Image
• Diagram

UpToDate Contents

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• 1. 性腺機能低下を呈する男性の臨床的特徴および診断 clinical features and diagnosis of male hypogonadism
• 2. 男性における原発性性腺機能低下の原因 causes of primary hypogonadism in males
• 3. 男性生殖生理学 male reproductive physiology
• 4. 男性不妊症の評価 evaluation of male infertility
• 5. 21－ヒドロキシラーゼ欠損症による古典的先天性副腎皮質過形成の遺伝学および臨床症状 genetics and clinical presentation of classic congenital adrenal hyperplasia due to 21 hydroxylase deficiency

English Journal

• Visualization and Lineage Tracing of Pax7+ Spermatogonial Stem Cells in the Mouse.

• Aloisio GM1, Cuevas I2, Nakada Y2, Peña CG2, Castrillon DH3.
• Methods in molecular biology (Clifton, N.J.).Methods Mol Biol.2017;1463:139-154.
• The precise identity of spermatogonial stem cells-the germline stem cell of the adult testis-remains a controversial topic. Technical limitations have included the lack of specific markers and methods for lineage tracing of Asingle spermatogonia and their subsets. Immunolocalization of proteins in t
• PMID 27734354

• Pubertal age based on testicular and epididymal histology in Göttingen minipigs.

• Taberner E1, Navratil N2, Jasmin B2, Salerno M2, Grambo B2, Althouse GC3.
• Theriogenology.Theriogenology.2016 Dec;86(9):2091-2095. doi: 10.1016/j.theriogenology.2015.07.030. Epub 2015 Jul 29.
• Göttingen minipigs are used worldwide as nonrodent animal models for toxicologic and pharmaceutical research. Having knowledge of the age for onset of puberty is an important consideration when designing such biomedical experiments. The present study reports an earlier age for puberty on the basis
• PMID 27613251

• Transplantation of alginate-encapsulated seminiferous tubules and interstitial tissue into adult rats: Leydig stem cell differentiation in vivo?

• Chen H1, Jin S2, Huang S3, Folmer J2, Liu J2, Ge R4, Zirkin BR2.
• Molecular and cellular endocrinology.Mol Cell Endocrinol.2016 Nov 15;436:250-8. doi: 10.1016/j.mce.2016.08.046. Epub 2016 Aug 31.
• In vivo and in vitro studies were conducted to determine whether testosterone-producing Leydig cells are able to develop from cells associated with rat seminiferous tubules, interstitium, or both. Adult rat seminiferous tubules and interstitium were isolated, encapsulated separately in alginate, a
• PMID 27591121

Japanese Journal

• Determination phase at transition of gonocytes to spermatogonial stem cells improves establishment efficiency of spermatogonial stem cells in domestic cats

• Journal of Reproduction and Development 61(6), 581-588, 2015
• NAID 130005113564

• 結晶型・位相コントラストX線CTによるラット精巣構造の観察

• Medical Imaging Technology 33(5), 203-207, 2015
• NAID 130005110538

• Determination phase at transition of gonocytes to spermatogonial stem cells improves establishment efficiency of spermatogonial stem cells in domestic cats

• Journal of Reproduction and Development advpub(0), 2015
• NAID 130005098942

Related Links

• seminiferous tubule | anatomy | Britannica.com

the origin and development of the sperm cells within the male reproductive organs, the testes. The testes are composed of numerous thin, tightly coiled tubules known as the seminiferous tubule s; the sperm cells are produced within ...

• Testis, Seminiferous Tubule - Necrosis - Nonneoplastic Lesion ...

Testis, Seminiferous tubule - Necrosis in a male Swiss Webster mouse from a chronic study. This higher magnification of Figure 1 shows that both germ ... Testis, Seminiferous tubule - Necrosis in a male B6C3F1 ...

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★リンクテーブル★

リンク元	「精細管」
関連記事	「tubule」

「精細管」

　　[★]

英

seminiferous tubule (HIS)

関

直精細管、曲精細管

• 精細管の上皮で精子が作られる。
• 組織学的には以下の2つに分けられる。
• 1. 直精細管
• 2. 曲精細管

• 精細管壁は厚い精上皮からなり、周囲を間質の結語嘘域で囲まれている。間質と精上皮は基底板 basal laminaで隔てられている。(HIS.414)

「tubule」

　　[★]

• n.

• 尿細管、細管

関

canaliculi、canaliculus、kidney tubule、renal tubular、renal tubule、tubular、uriniferous tubule