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29 April, 14:51

During which prenatal developmental period do the following changes take place? Eyes appear, four chambers of the heart take shape, spinal cord begins to form, and the intestinal tract develops.

A. germinal

B. embryonic

C. fetal

D. zygotic

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  1. 29 April, 18:30
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    B. embryonic is the correct answer

    Explanation:

    Prenatal development is the period between conceiving and childbirth.

    Stages of prenatal development

    Germinal stage: The two weeks after the conception is termed as a germinal stage.

    Conception happens when a sperm cell and egg cell combine to form the zygote.

    Embryonic development: is the stage after the implantation, during this period embryo starts to split into three layers, which will develop into major organs.

    Fetal stage: starts during the ninth week till birth. During this stage sex organs of the fetus start to develop.

    The fetus grows very fast as the bones and muscles develop.
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