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The heart is the second organ to develop in the embryo, following the development of the neural tube. It starts to form and beat by about the third week of gestation.
The embryo develops in the uterus of the mother.
The first organ to develop in the embryo is the heart. It starts to form and beat as early as 3 weeks after conception.
The first organ to form in an embryo is the heart. It starts to develop early in gestation and is essential for pumping blood and circulating nutrients throughout the body as the embryo grows.
The heart is the first organ to form in a human embryo. It begins to develop and beat as early as week 3 of gestation.
The first organ to develop in the embryo is the heart. In a fetus, there is a brain, but it isn't fully developed and can't understand signals from the nervous system. Therefore the first functional organ would be the heart. But the first thing to start developing in a fetus is the nervous system. ( no that isn't an organ )