Question

In human fetus, the heart begins to beat at a developmental age of

• A. 4${}^{th}$ week
• B. 3${}^{th}$ week
• C. 6${}^{th}$ week
• D. 8${}^{th}$ week

Answer 1

Answer: (A)

4${}^{th}$ week

Heart development refers to development of the human heart. This begins with the formation of two endocardial tubes, which merge to form the tubular heart, also called as the primitive heart tube, that loops and separates into the four chambers and paired arterial trunks, that form the adult, human heart. The heart is the first functional organ in vertebrate embryos, and in the human, beats spontaneously by week 4 of development. Hence, option A is correct.