During which gestational week does the embryo unfold?

During which gestational week does the embryo unfold?

• A. 6th week
• B. 7th week
• C. 8th week
• D. 9th week

Answer: (C)

The main idea is the transition from the embryonic form to a recognizable human shape, which completes during the eighth week. By this time the basic body plan is in place: limb buds are present with developing fingers, the head is still large but features begin to differentiate, and organ systems have begun to form and fold into their basic arrangements. The embryo has essentially unfolded into a recognizable human form, marking the end of the embryonic period. After this week, the developing baby is typically referred to as a fetus, so the eighth week is the turning point where the embryo’s form becomes clearly human and more organs take shape, even though they are not yet fully mature.

The main idea is the transition from the embryonic form to a recognizable human shape, which completes during the eighth week. By this time the basic body plan is in place: limb buds are present with developing fingers, the head is still large but features begin to differentiate, and organ systems have begun to form and fold into their basic arrangements. The embryo has essentially unfolded into a recognizable human form, marking the end of the embryonic period. After this week, the developing baby is typically referred to as a fetus, so the eighth week is the turning point where the embryo’s form becomes clearly human and more organs take shape, even though they are not yet fully mature.