Cardiogenesis animation by Dr. Stella Clare Seppings
“Cardiac Development” by Lisa McCabe for OPENPediatrics.
OPENPediatrics is an interactive digital learning platform for healthcare clinicians sponsored by Boston Children’s Hospital.
Embryonic heart pulsation is the earliest proof that the embryo is alive. Cardiac pulsation has been documented in utero by transvaginal scanning as early as 36 days menstrual age (22 days after fertilization), the time when the heart tube starts to beat.
sciencedirect.com/topics/biochem…
“Through these various channels the early embryonic circulation is established. By the end of the 3rd week the primitive cardiovascular system has been established & the ❤️ has begun to beat so that the blood now circulated.”
-Peter L. Williams, Gray’s Anatomy, 38th ed. Pg 157
By the end of the 3rd wk, the blood is circulating, and the heart begins to beat, on the 21st or 22nd day. The cardiovascular system is the 1st system to reach a functional state. The embryonic heartbeat can be detected using Doppler ultrasonography during the 4th wk, (6wks LMP).
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