During the fourth week of prenatal development, the urogenital system becomes apparent, and ________ emerge.
A) fingernails and toenails
B) hair and eyelashes
C) arm and leg buds
D) eyes and eyelids

Question

Quizplus · Accepted Answer

During the fourth week of prenatal development, the embryo begins to form arm and leg buds, which are the early stages of limb development. This is a critical period for the differentiation of the major organ systems, including the urogenital system.

During the Fourth Week of Prenatal Development, the Urogenital System