n.early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs

同義詞：blastodermic vesicle

Blastulas, Gastrulas and the First Animals
On abnormal blastulas in Elephantulus
[Production of partial blastulas by parthenogenesis in Xenopus]
Comment se nomme les blastulas qui ne présentent pas de blaslocoele ?
Parthenogenesic production of partial blastulas in Xenopus
Derivation of embryonic cell lines from red sea bream blastulas
Derivation of a pluripotent embryonic cell line from red sea bream blastulas
Method for analyzing embryo quality based on molecular immunoassay of mammalian blastulas
[Nuclear labeling of blastulas and embryonal explants of amphibians by tritiated thymidine. Evolvement of the labeled nuclei in the ...
Derivation and characterization of a ES-like cell line from indian catfish Heteropneustes fossilis blastulas.