| Term | Definition |
|---|
| corpus luteum | name given to a follicle after ovulation |
| epididymis | structure in the male reproductive system in which sperm fully mature are stored |
| fallopian tube | one of two fluid-filled tubes in human females through which an egg passes after its release from an ovary |
| follicle | cluster of cells surrounding a single egg in the human female reproductive system |
| menstrual cycle | cycle during which an egg develops and is released from an ovary and the uterus is prepared to receive a fertilized egg |
| menstruation | phase of the menstrual cycle during which the lining of the uterus, along with blood and the unfertilized egg. Is discharged through the vagina |
| ovulation | process in which an egg is released from the ovary |
| penis | external male reproductive organ |
| puberty | period of rapid growth and sexual maturation during which the reproductive system becomes fully functional |
| scrotum | external sac containing the testes |
| seminiferous tubule | one of hundreds of tiny tubules in the testes in which sperm are produced |
| sexually transmitted disease | disease spread from one person to another during sexual contact |
| urethra | tube that carries urine from the bladder and releases it from the body; in males, tube through which semen is released from the body |
| uterus | organ of the female reproductive system in which a fertilized egg can develop |
| vagina | in the human female reproductive system, a canal that leads from the uterus to the outside of the body |
| vas deferens | tube that carries sperm from the epididymis to the urethra |
| blastocyst | the early developmental stage of an embryo following the morula stage and consisting of a single layer of cells enclosing a hollow, central cavity |
| differentiation | process in which cells become specialized in structure and function |
| fertilization | the process of a sperm joining an egg |
| fetus | name given to a human embryo after eight weeks of development |
| gastrulation | process of cell migration by which a third layer of cells is formed within the cavity of a blastocyst |
| implantation | process in which a blastocyst attaches itself to the uterine wall |
| neurulation | development of the nervous system in the embryo |
| placenta | organ in placental mammals through which nutrients, oxygen, carbon dioxide and wastes are exchanged between embryo and mother |
| zygote | a fertilized egg |
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