The human heart starts beating around ............. days of embryonic development. A.22
B.21
C.23
D.24
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4
Answer:
In human embryos the heart begins to beat at about 22-23 days, with blood flow beginning in the 4th week. The heart is therefore one of the earliest differentiating and functioning organs. The heart begins very early in mesoderm within the trilaminar embryonic disc.
Answered by
8
Answer:
YOUR ANSWER IS B ( 21 )
Explanation:
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MARK BRAINLIEST
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