| A | B |
| acne | when skin pores become blocked and infected by oil and dirt |
| conception | the process of becoming pregnant by fertilization |
| fertilization | a release of the union of two sex cells when the development of a new individual begins |
| hormones | chemicals that regulate growth and body development |
| menstruation | the monthly process of the shedding of the blood filled tissue (endometrium) lining of the uterus |
| ovaries | the female sex organs that produce the egg |
| ejaculation | a release of fluid called semen |
| estrogen | the female sex hormone produced by the ovaries |
| ovulation | the release of a mature egg from the ovary |
| penis | the male reproductine organ |
| pituitary | a gland in the brain that controls growth |
| puberty | the time in life when a person physically changes from a child to a youg adult and becomes capable of reproduction |
| semen | a whitw fluid produced by a male which contains sperms |
| STD's | sexualy transmitted diseases |
| testes | the male sex organs that produce sperm (singular: testis) |
| testorterone | the male sex hormone produced by the testes |
| sexual intercourse | the process by which humans reproduce |
| sperm | the male reproductibe cell produced by the testes |
| uterus | the female reproductive cell organ that provides an enviorment where a fertilized egg can grow |