Asked by: Maysaa Matsko
asked in category: General Last Updated: 30th January, 2020

What are the three stages of embryonic development?

This period is generally divided into three stages: the germinal stage, the embryonic stage, and the fetal stage. The two-week period after conception is called the germinal stage. Conception occurs when a sperm cell combines with an egg cell to form a zygote.

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In this regard, what are the 4 stages of embryonic development?

Carnegie Stage Table

Stage Days (approx) Events
1 1 (week 1) fertilized oocyte, zygote, pronuclei
2 2 - 3 morula cell division with reduction in cytoplasmic volume, blastocyst formation of inner and outer cell mass
3 4 - 5 loss of zona pellucida, free blastocyst
4 5 - 6 attaching blastocyst

Also, what happens in the embryonic stage? The embryonic stage of gestation is the period after implantation, during which all of the major organs and structures within the growing mammal are formed. Once the embryo is fully formed, it expands, grows, and continues to develop in what is known as the fetal development stage.

Correspondingly, what are the 3 stages of fetal development?

There are three stages of prenatal development: germinal, embryonic, and fetal. Prenatal development is also organized into three equal trimesters that do not correspond with the three stages. The germinal stage occurs from conception until 2 weeks (implantation), during which the zygote begins to rapidly divide.

What are the three stages of prenatal development quizlet?

11.1 Outline the major events of the three stages of prenatal development. Prenatal development proceeds through the germinal (first 2 weeks), embryonic (2 weeks to 2 months), and fetal stages (2 months to birth) as the zygote is differentiated into a human organism.

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