The<unk>  is the organ that makes gametes. The<unk> s in males are the testes and the<unk> s in females are the ovaries. The product, gametes, are haploid germ cells. For example, sperm and egg cells are gametes. Although medically the<unk>  term can refer to either male<unk> s (testicles) or female<unk> s (ovaries), the vernacular, or slang use of<unk> s" (or "nads") usually only refers to the testicles.
Gonad
Sex organ
Ovary
Callus
Breast
Hymen
Endometrium
Operon