Spermatogonium


Spermatogonium

Infobox Anatomy
Name = Spermatogonium
Latin =
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GrayPage = 1243


Caption = Germinal epithelium of the testicle. 1 basal lamina, 2 spermatogonia, 3 spermatocyte 1st order, 4 spermatocyte 2nd order, 5 spermatid, 6 mature spermatid, 7 Sertoli cell, 8 tight junction (blood testis barrier)



Caption2 = Histological section through testicular parenchyma of a boar. 1 Lumen of Tubulus seminiferus contortus, 2 spermatids, 3 spermatocytes, 4 spermatogonia, 5 Sertoli cell, 6 Myofibroblasts, 7 Leydig cells, 8 capillaries
Width = 325
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MeshName = Spermatogonia
MeshNumber = A05.360.490.890.900
A spermatogonium (plural: "spermatogonia") is an intermediary male gametogonium (a kind of germ cell) in the production of spermatozoa.

There are three subtypes:

*Type A(d) cells, with dark nuclei. These cells divide to produce copies of themselves, thereby ensuring a constant supply of spermatogonia to fuel spermatogenesis.

*Type A(p) cells, with pale nuclei. These cells divide by mitosis to produce Type B cells.
*Type B cells, which divide to give rise to "primary spermatocytes".

Each primary spermatocyte duplicates its DNA and subsequently undergoes meiosis I to produce two haploid secondary spermatocytes. Each of the two secondary spermatocytes further undergo meiosis II to produce two spermatids (haploid). (1 primary spermatocyte => 4 spermatids)

The spermatids then undergo spermiogenesis to produce spermatozoa.


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Look at other dictionaries:

  • Spermatogonium — Sper ma*to*go ni*um, n. [NL., fr. Gr. ????, ???, sperm + ??? offspring.] (Physiol.) A primitive seminal cell, occuring in masses in the seminal tubules. It divides into a mass (spermosphere) of small cells (spermoblast), which in turn give rise… …   The Collaborative International Dictionary of English

  • spermatogonium — spermatogonium. См. сперматогоний. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Spermatogonium — Spermatogonium, 1) Tiere: Urkeimzelle im Hoden der Metazoen, aus der bei der ⇒ Spermatogenese die Spermien entstehen; 2) Pflanzen: ⇒ Spermangium …   Deutsch wörterbuch der biologie

  • spermatogonium — [spʉr΄mə tōgō′nē əm, spər mat΄əgō′nē əm] n. pl. spermatogonia [spʉr΄mə tō gō′nē ə, spər mat΄ə gō′nē ə] [ModL < SPERMATO + Gr gonē, seed: see GONAD] Zool. a primitive male germ cell which divides into spermatocytes or more spermatogonia… …   English World dictionary

  • Spermatogonium — Spermatogonien (Einzahl Spermatogonium oder Spermatogonie), auch Ursamenzellen, sind die Stammzellpopulation im sogenenannten Keimepithel des Hodens. Diese auf eine Entwicklung zu Samenzellen festgelegten gewebsspezifischen Stammzellen entstehen… …   Deutsch Wikipedia

  • Spermatogonium — spermatogonija statusas T sritis šlapimo ir lyties aparatas atitikmenys: lot. Spermatogonium ryšiai: platesnis terminas – sėklidė …   Paukščių anatomijos terminai

  • Spermatogonium A — A spermatogonija statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Spermatogonium A ryšiai: platesnis terminas – spermatogonija …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Spermatogonium A — A spermatogonija statusas T sritis histologija, ląstelių chemija, histologinė chemija, audinių kultūra atitikmenys: lot. Spermatogonium A ryšiai: platesnis terminas – spermatogonija …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Spermatogonium B — B spermatogonija statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Spermatogonium B ryšiai: platesnis terminas – spermatogonija …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Spermatogonium B — B spermatogonija statusas T sritis histologija, ląstelių chemija, histologinė chemija, audinių kultūra atitikmenys: lot. Spermatogonium B ryšiai: platesnis terminas – spermatogonija …   Veterinarinės anatomijos, histologijos ir embriologijos terminai


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