21 terms

IGCSE Biology - Human Reproductive System

Key terms from Edexcel IGCSE Biology on the topic of human reproductive systems
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Vagina
Muscular passage leading from the external genitals to the cervix of the uterus
Cervix
Narrow passage forming the lower end of the uterus, it dilates during childbirth to allow a baby to pass through
Womb / Uterus
Female organ with a thick muscular wall where a fertilised egg can implant and develop
Fallopian tubes
Transports the egg from the ovary to the uterus. Lined with tiny hair cells called cilia which waft the egg along.
Ovary
A female reproductive organ in which eggs are produced
Urethra
Tube that allows urine to pass from the bladder out of the body. In males, the urethra travels through the penis and carries semen as well as urine.
Penis
Male reproductive organ that allows urine and semen to be discharged from the body
Erectile tissue
Group of cells capable of filling with blood and becoming rigid
Testes
Pair of glands that produce sperm and the male sex hormone testosterone
Sperm duct
Connects the testes to the urethra
Seminal vesicles
Glands that secrete seminal fluid
Semen
Fluid released from the penis during orgasm, composed or seminal fluid and sperm
Scrotum
External sac of skin that surrounds the testes
Zygote
A diploid cell resulting from the fusion of two haploid gametes i.e. a fertilized ovum
Embryo
An unborn baby in the early stages of development before it is recognisably human
Fetus
An unborn baby that is recognisably human
Placenta
Organ that develops during pregnancy and is connected to the fetus by the umbilical cord
Amnion
Membrane that encloses a developing embryo
Amniotic fluid
Cushions and protects the developing embryo against jolts and bumps
Umbilical Cord
Connects the developing fetus with the placenta, allowing the transport of oxygen and nutrients from the mother, and the removal of waste products from the fetus.
Progesterone
Hormone secreted by the placenta to maintain pregnancy and prevent the embryo aborting
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