The early position of the primordial germ cells in urodeles: Evidence from experimental studies
β Scribed by Humphrey, R. R.
- Publisher
- John Wiley and Sons
- Year
- 1929
- Tongue
- English
- Weight
- 738 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0003-276X
No coin nor oath required. For personal study only.
β¦ Synopsis
Department of Anotomg, Rchool of Metlicinc., Dnitrersity of Bufalo
TEN FlGURES
I n a previous paper (Humplircy, '25) the author stated his conclusion, based entirely on morphological studies, that the primordial germ cells of the urodcles are mesodermal in position from the time mesoderm and entoderm become scpa- rate germ layers. With this interpretation the great majority of workers on the urodele germ cells are in agreement (Hall, '04; Dustin, '07; Allen, '11; Schapitz, '12; Spehl et Polus, '12; Bcccari, '22; Burns, ' 2 5 ) . Rbramowicz ('13), 011 the other hand, claims that the primordial germ cells of Triton migrate singly from the entoderm into the mesoderm at a
π SIMILAR VOLUMES
Experiments were conducted to elucidate the factor that influences the concentration of circulating primordial germ cells (cPGCs) in two-day old chick embryos. The concentration of cPGCs was observed to be highest at stage 14 (66.9 Β± 23.2 Β΅l) and decreased thereafter. However, considerable egg to eg
## Abstract Little information is available concerning enzyme activity in primordial germ cells (PGCs) of the early chick embryo. The present study is designed to examine the disposition of alkaline and acid phosphatase activity in the PGCs during their migration into the developing gonads of the e
It is known that chick primordial germ cells (PGCs) in early embryonic development migrate via the blood vascular system to colonize the gonadal anlagen. Classically, two factors have been involved in the extravasation of PGCs from the blood stream: chemotactic and mechanical factors. An accurate kn