Chapter 18-1 Testes: the primary male reproductive organs, which produce sperm and testosterone. Singular-testis Penis: the male organ that transfers sperm to a female and that carries urine out of the body. -where semen leaves the male body thru

Ovary: in the female reproductive system of animals, - an organ that produce eggs. Uterus: in female placental mammals, - the hollow, muscular organ in which an embryo embeds itself and develops into a fetus. - where the zygote develop

Vagina: the female reproductive organ that connects the outside of the body to the uterus. - the canal thru which a baby passes

STD (sexual transmitted disease): - a disease transmitted by sex STD (sexual transmitted disease): - a disease transmitted by sex. Ex) chlamydia, human papillomavirus, genital herpes, gonorrhea, syphilis, and HIV/AIDS Sexual activity that releases only a few sperm can lead to fertilization and pregnancy.

In fertilization, ONE x-me comes from each parent In fertilization, ONE x-me comes from each parent. Menstrual Cycle (MC): to prepare the body for pregnancy. - a monthly cycle of changes.