(a) What is ovulation? How often does it happen in human females? (b) Where does fertilisation take place in human females? (c) Explain why fertilisation is possible if mating takes place during the middle of the menstrual cycle. (d) What is meant by implantation? (e) What is placenta? What is its function? (f) What joins embryo to the placenta in mother's body?
Placenta protects the embryo from entry of pathogen from mother’s body.
How does embryo gets nourishment inside the mothers body?
How does the embryo get nourishment inside the mother's body? What is the placenta?