kingvonn2261 kingvonn2261

11-11-2021
Biology

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

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chepgill24 chepgill24

11-11-2021

Answer:

fourth week of pregnancy

Explanation:

Mark me brainly please

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kimberly198116 kimberly198116

11-11-2021

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.

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