The changes of puberty, the male and female reproductive systems, fertilisation and the growth of the embryo, and how people look after their reproductive health.
3 lessons, about 1 h 15 min3 simulations10 problems3 practice questionsPython in every lesson
Created by StemPy LabIn human beings, sexual reproduction needs special cells made by the reproductive organs, which become active at puberty. In males the testes make sperm and the hormone testosterone; tubes and glands carry the sperm out of the body. In females the ovaries release one egg each month, and the oviduct carries it to the uterus.
Fertilisation takes place in the oviduct, where a sperm fuses with the egg to form a zygote. The zygote divides as it moves to the uterus and settles in its thick lining. The placenta passes food and oxygen from the mother to the embryo and removes its wastes. If the egg is not fertilised, the lining breaks down and comes out as menstruation.
Reproductive health means a healthy body and mind, and a society that supports them. Some diseases spread through sexual contact; a condom reduces the risk. Pregnancy can be prevented by barrier methods, hormone pills, devices in the uterus or surgery. Finding the sex of a baby before birth is banned by law, because sex selection has lowered the number of girls.
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