This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Gray. Human ovum examined fresh in the liquor folliculi Waldeyer The zona pellucida is seen as thick clear girdle surrounded by the cells of the corona radiata The egg itself shows central granular deutoplasmic area and peripheral clear layer and encloses the germinal vesicle in which is seen the germinal spot Other fields Information