The Menstrual Cycle

Question 1

Fertilisation

Answer 1

Process by which the sperm cell nucleus fuses with the egg cell nucleus to produce a zygote

Question 2

Menstruation Cycle

Answer 2

1) If the egg is not fertilised, the lining of the uterus is shed as it is not needed. Bleeding usually lasts for 2-5 days, this is called a period
2) The lining of the uterus starts to regrow ready for if she becomes pregnant. It is made of spongey tissue.
3) At around day 14, another egg is ready to released from the ovary, waiting to be fertilised. When the egg is released it is called ovulation.
4) The lining of the uterus begins to thicken, ready for a pregnancy. She can become pregnant for a few days after ovulation

Question 3

How long does the menstrual cycle last?

Answer 3

28-32 days