spermatogonium

[spər‚mad·ə′gō·nē·əm]

(histology)

A primitive male germ cell, the last generation of which gives rise to spermatocytes.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Spermatogonium

a developing male sexual cell during the period of division prior to growth. Spermatogonia are in a state of rapid mitotic division. Primary and secondary spermatogonia are distinguished in insects and certain other invertebrates; secondary spermatogonia, the smaller of the two types, are surrounded by cells that form the seminal vesicle, or spermatocyst. Mammals have two types of spermatogonia, which differ in degree of differentiation and in chromatinic structure. The duration of the period of division varies from one animal species to another, depending on the number of generations and the rate of division of spermatogonia—parameters that are constant for eachspecies. Spermatogonia are formed in the parietal layer of the seminiferous tubules. Many animals have a specific zone of division in the cecum of the testes.

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References in periodicals archive

Spermatogenic cell series in seminiferous tubule wall, spermatogonium, primary spermatocytes, spermatid cell, and Sertoli cell were found normal and comparable to the untreated control (Figure 4a-d).

Effect of sodium selenite on testicular damage induced by Cisplatin in adult male rats

This is the longest phase of spermatogenesis, accounting for as much as 30 percent of the time required for a spermatogonium to develop into a spermatozoon.

Chapter 9: Dynamics of testicular function in the adult male

VDR has been shown in the epididymis, spermatogonium and Sertoli cells.

VDR is found in the smooth muscle of epididymis, spermatogonium, Sertoli cells and head of the sperm indicating an important role in the production and transport of sperm (Kinuta et al., 2000).

Relationship between Vitamin Composition and Spermatological Characteristics in Semen of Different Ram Breeds of Turkey

FGF8 is expressed during specific phases of rodent oocyte and spermatogonium development.

Role of postnatal expression of Fgfr1 and Fgfr2 in testicular germ cells on spermatogenesis and fertility in mice

The spermatogonium is a large, oval-shaped structure ranging from 5-7 [micro]m in diameter, and it contained a clear nucleus with small areas that stained light blue as a result of uncoiled euchromatin (Fig.

Reproductive histology of cultured Haliotis midae (Linnaeus, 1758) and preliminary evaluation of maturation

As it is shown in table 3, spermatogonium significantly increased in the HFD+A group (p < 0.05).

Protective effects of antioxidants on sperm parameters and seminiferous tubules epithelium in high fat-fed rats

In males, examination of nuclear characteristics and cell size revealed that the germ cells could be classified into four stages: spermatogonium, spermatocyte, spermatid, and spermatozoa.

Maturation process of broodstock of the pen shell Atrina pectinata (Linnaeus, 1767) in suspension culture

They are spermatogonium, 5 stages of primary spermatocyte, secondary spermatocyte, 2 stages of spermatid and spermatozoa (Fig.

Gametogenic processes in the pearl oyster, Pteria penguin (Roding, 1798) (Bivalvia, Mollusca)