KS3 Science · Biology
Human reproduction
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Key words
Gamete A sex cell: a sperm or an egg
Testes The organs where sperm are made
Penis Carries sperm out of the male’s body
Ovary An organ that contains eggs and releases them
Oviduct The tube from an ovary to the uterus, where fertilisation happens
Uterus The organ where a baby develops, also called the womb
Vagina Receives sperm, and is the way out for a baby at birth
Menstrual cycle A 28-day cycle that prepares the uterus for pregnancy
Ovulation The release of an egg from an ovary
Menstruation The loss of the lining of the uterus, also called a period
Fertilisation The nucleus of a sperm joining with the nucleus of an egg
Embryo The ball of cells that grows from a fertilised egg
Implantation The embryo settling into the lining of the uterus
Foetus The developing baby, from about eight weeks until birth
Gestation The nine months when the baby develops in the uterus
Placenta Organ where substances pass between mother and foetus
Umbilical cord Joins the foetus to the placenta
Amniotic fluid The liquid around the foetus that protects it