Which starts functioning first in a fetus, the heart or the brain?

1 Answer
A. Shaikh
Jun 10, 2016

The heart.

Explanation:

The premature heart starts pumping at 4th week of gestation. While the process of neurulation (formation of CNS and PNS) starts in 3rd week of gestation and completes when the embryo is about 2 months of age.

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