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4 Explain the term: (2)a) Implantationb) Placenta |
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Answer» a) Implantation is the beginning of pregnancy at which stage the embryo adheres to the wall of the uterus.Some embryos fail to implant in the womb, while others implant successfully, leading to pregnancy. b)A special tissue embedded in the uterus wall with the help of which human embryo gets nutrition from mother’s blood. |
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