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germinal disc
Sign in to saveAlso known as blastodisc
thumb|Embryo of Zebrafish undergoing cleavage The blastodisc, also called the germinal disc, is the embryo-forming part on the yolk of the egg of an animal that undergoes discoidal meroblastic cleavage. Discoidal cleavage occurs in those animals with a large proportion of yolk in their eggs, and include insects, fish, reptiles and birds. The blastodisc is a small disc of cytoplasm that sits on top of the yolk. In birds, it is a small, circular, white spot (approximately 1.5-3 mm across) on the surface of the yellow yolk of an egg, at the animal pole.
Research
291 papers- Quantitative Protein Analysis of ZPB2, ZPB1 and ZPC in the Germinal Disc and a Non-Germinal Disc Region of the Inner Perivitelline Layer in Two Genetic Lines of Turkey Hens That Differ in Fertility.Animals : an open access journal from MDPI · 2022
- Localization of the fertilized germinal disc in the chicken egg before incubation.Poultry science · 2002
- The structure of the germinal disc region of the hen's ovarian follicle during the rapid growth phase.Journal of anatomy · 1978
- Fertilization 1: Sperm-Egg Interaction.Advances in experimental medicine and biology · 2017
- Germinal disc-derived epidermal growth factor: a paracrine factor to stimulate proliferation of granulosa cells.Biology of reproduction · 2001
via PubMed
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Article
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- References
thumb|Embryo of Zebrafish undergoing cleavage The blastodisc, also called the germinal disc, is the embryo-forming part on the yolk of the egg of an animal that undergoes discoidal meroblastic cleavage. Discoidal cleavage occurs in those animals with a large proportion of yolk in their eggs, and include insects, fish, reptiles and birds. The blastodisc is a small disc of cytoplasm that sits on top of the yolk. In birds, it is a small, circular, white spot (approximately 1.5-3 mm across) on the surface of the yellow yolk of an egg, at the animal pole.
==References== Early Development in Fish Early Development in Birds