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FERTILISATING: joining of the ovum with the spermatozoa, when the pen enter into the vagina, spermatozoa travel thong the female internal genitala /PREGNANCY OR GESTATION: begins with the implantation of the embryo in the endometrium, the embryo grow and survive / AMNIOTIC SAC: this membrane containing amniotic fluid that protects the embryo/ UMBILICAL CORD: connects the embryo to the placenta / PLACENTA: organ with so many blood vessels, mothers and embryos blood do not mix, placenta allows the nutrients and oxygen from the mother to pass it to the embryo, carbon dioxide and waste productos from the embryo pass to the mothers blood

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