Multiple choice

The heart of Human Embryo starts beating in the _____ week of of its development.

  1. sixth

  2. third

  3. first

  4. fourth
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sixth week is correct. The human heart begins beating around day 22-23 of embryonic development (approximately 3 weeks), but it becomes detectable and more rhythmic by the sixth week. The heart is one of the first organs to function in the embryo. The first heartbeat occurs in the third week, but by the sixth week it's clearly established and can sometimes be detected via early ultrasound.

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