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DiKsa [7]
2 years ago
15

The heart of an embryo starts to pump blood by the ________.

Biology
2 answers:
astra-53 [7]2 years ago
6 0
Emerging from the placenta is the umbilical vein, which carries oxygen-rich blood from the mother to the fetal inferior vena cava via the ductus venosus to the heart that pumps it into fetal circulation.
melamori03 [73]2 years ago
5 0

Answer:

fourth week of pregnancy

Explanation:

Mark me brainly please

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