What are the stages of development in the pre-embryonic period of embryology?
Understand the Problem
The question pertains to embryology, specifically the stages of development before birth, including fertilization, zygote formation, cleavage, and the transition to a morula and blastocyst.
Answer
Fertilization, cleavage, morula, blastocyst.
The stages of the pre-embryonic period include fertilization, cleavage (mitotic divisions of the zygote), formation of the morula, and development of the blastocyst.
Answer for screen readers
The stages of the pre-embryonic period include fertilization, cleavage (mitotic divisions of the zygote), formation of the morula, and development of the blastocyst.
More Information
The pre-embryonic period is the earliest phase of development, starting with the fusion of gametes followed by rapid cellular divisions and formation of early structures like the morula and blastocyst.
Tips
A common mistake is confusing the stages with the later embryonic or fetal stages. It's important to focus on the events immediately following fertilization.
Sources
- Pre-Embryonic Period - Social Sci LibreTexts - socialsci.libretexts.org
- 28.2 Embryonic Development – Anatomy & Physiology - open.oregonstate.education
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