Which of the following statements about fetal heart development is false?
A) The four heart chambers first develop during the third trimester.
B) The heart begins as a pair of tubes in the midline of the thorax.
C) The heart develops from mesodermal mesenchyme.
D) The two atria are connected by a foramen ovale until birth.

Question

Quizplus · Accepted Answer

The four heart chambers actually begin to develop during the first trimester, around week 5 or 6 of gestation. By the end of the embryonic period, which is around week 10, the heart has already formed all four chambers.

Which of the Following Statements About Fetal Heart Development Is