From Embryology

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Fig. 1. Human ovum examined fresh in the liquor folliculi

(Waldeyer) original x415

The zona pellucida is seen as a thick clear girdle surrounded by the cells of the corona radiate. The nearly mature egg itself shows a central granular cytoplasmic area and a peripheral clear layer, and encloses the nucleus in which is seen the nucleolus. At the right is a spermatozoon correspondingly enlarged.

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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)


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