Components of the genital systems may be considered in the following categories:
a. Primary Sex Organs (Gonads). Primary sex organs produce sex cells (gametes). A male gamete and a female gamete may be united to form the one-cell beginning of an embryo (the process of fertilization). Primary sex organs also produce sex hormones.
b. Secondary Sex Organs. Secondary sex organs care for the product of the primary sex organ.
c. Secondary Sexual Characteristics. Secondary sexual characteristics are those traits that tend to make males and females more attractive to each other. Secondary sexual characteristics help to ensure mating. These characteristics first appear during puberty (10-15 years of age).
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