The period when major systems, organs, and structures are formed is called the period of the
A) ovum.
B) fetus.
C) embryo.
D) zygote.

Name: The period when major systems, organs, and structures are formed is called the period of the A) ovum. B) fetus. C) embryo. D) zygote.
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Quizplus · Accepted Answer

The period when major systems, organs, and structures are formed is called the embryonic period. This occurs from fertilization through the first 8 weeks of pregnancy, during which time the zygote develops into an embryo.

The Period When Major Systems, Organs, and Structures Are Formed