Which of the following occurs during the embryonic development period from weeks 3 to 8?

• A. Formation of the placenta
• B. Development of the fetal heartbeat
• C. Formation of the neural tube
• D. Rapid growth of the fetus

Answer: (C)

Verified step by step guidance

1. Understand the timeline of embryonic development: The embryonic period spans from weeks 3 to 8 after fertilization. This is a critical phase where major organs and structures begin to form.
2. Identify key processes during the embryonic period: During this time, the embryo undergoes significant changes, including the formation of the neural tube, which eventually develops into the central nervous system (brain and spinal cord).
3. Differentiate between embryonic and fetal development: The fetal period follows the embryonic period, starting from week 9 until birth. Rapid growth and further development of organs occur during the fetal period.
4. Recognize the formation of the neural tube: The neural tube formation is a crucial event in the embryonic period, typically occurring around the third week. It begins with the folding of the neural plate and closure of the neural folds.
5. Clarify the other options: The formation of the placenta and development of the fetal heartbeat are processes that begin during the embryonic period but continue into the fetal period. Rapid growth of the fetus is characteristic of the fetal period, not the embryonic period.