By the end of the _____ period,the heart begins to beat,the arms and legs become more differentiated,the face starts to form,and the intestinal tract appears in human beings.

Question

Quizplus · Accepted Answer

The description of the heart beginning to beat, arms and legs becoming more differentiated, facial formation, and the appearance of the intestinal tract all occur during the embryonic period, which takes place from the third to the eighth week of gestation. Therefore, the best choice for the blank is D, embryonic.

By the End of the _____ Period,the Heart Begins to Beat,the