An unborn baby is called an embryo up to eight weeks after fertilisation. The embryo forms from part of the ball of cells implanted in the mothers womb. Its life-support system is the placenta, a disc-shaped organ with many blood vessels, connected to the baby by the umbilical cord through which the baby feeds.
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VIJAY BHASKAR REDDY
An unborn baby is called an embryo up to eight weeks after fertilisation. The embryo forms from part of the ball of cells implanted in the mothers womb. Its life-support system is the placenta, a disc-shaped organ with many blood vessels, connected to the baby by the umbilical cord through which the baby feeds.