spermatogonia

The primary germ cells undergo division and produce a number of cells termed spermatogonia, and from these the primary spermatocytes are derived.

I. Embryology. 3. The Spermatozoön 1918

But the spermatogonia — the immature stem cells in the testes that replenish sperm — are constantly dividing and replicating, with each round of division creating another possibility for error.

Fertility Clock Ticks for Men, Too | Impact Lab 2007

Feeding of freshly irradiated wheat resulted in significantly increased incidence of polyploid cells in bone marrow, aneuploid cells in testis, reduction in number of spermatogonia of types A, B and resting primary spermatocytes as well as a higher mutagenic index.

NUKED FOOD News from Mad Plato 2008

Feeding of freshly irradiated wheat resulted in significantly increased incidence of polyploid cells in bone marrow, aneuploid cells in testis, reduction in number of spermatogonia of types A, B and resting primary spermatocytes as well as a higher mutagenic index.

Archive 2008-08-01 News from Mad Plato 2008

For the fish, ENU treatment of spermatogonia has been used with a similar efficiency of mutagenesis as that obtained by EMS treatment of sperm in the fly

Nobel Lecture The Identification Of Genes Controlling Development In Flies And Fishes 1995

Although they have fully developed secondary sexual characters and show libido, their testes do not produce spermatozoa because the seminiferous tubules are poorly developed and the spermatogonia and their nuclei are degenerate.

1 Domesticated Banteng 1983

The nuclei of some of the spermatogonia may be seen to be in process of indirect division (karyokineses, page 37), and in consequence of this daughter cells are formed, which constitute the second zone.

XI. Splanchnology. 3c. The Male Genital Organs 1918

Whilst the spermatogonia become transformed into spermatozoa, other cellular structures of the testicle, more especially the interstitial cells, produce, it is assumed, the internal secretion of the gland.

The Sexual Life of the Child Albert Moll 1900

With regard to internal development, after the discharge of spermatozoa in the breeding season the spermatogonia divide and proliferate, forming groups of cells known as spermatocysts.

Hormones and Heredity J. T. Cunningham 1897

About six months after the operation the testis left _in situ_ was smaller, the seminal tubules contained few spermatogonia, though Sertoli's cells (cells on the walls of the tubules to which the true spermatic cells are attached) were unchanged; while the interstitial cells were enormously developed, by compensatory hypertrophy in consequence of the removal of the other testis.

Hormones and Heredity J. T. Cunningham 1897