| 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 |
