after fertilisation in the oviduct,zygote travels towards the uterus while forming a ball of cells - embryo ( 3 days)
embryo embeds itself in thick lining of the uterus (implantation). grows n develops
a placenta forms where embryo attached: an organ that ensures materials can be exchanged btwn blood of mother n embryo
the umbilical cord joins the embryo's blood supply to the placenta
embryo surrounded by amniotic fluid which protects embryo by cushioning it from bumps (a fluid made from the mother’s blood plasma) that is held in by the amniotic membrane (amniotic sac)