Changes

Unlike the female sex glands, [[ovary|ovaries]], the testes are located outside of the body in the scrotum. This is to achieve temperature regulation necessary for optimal sperm production, as normal body temperature is too warm for this. As the testicular temperature drops, the testes are drawn closer to the body for additional warmth. As the testicular temperature increases, the testes lower away from the body in order to cool off.

Unlike the female sex glands, [[ovary|ovaries]], the testes are located outside of the body in the scrotum. This is to achieve temperature regulation necessary for optimal sperm production, as normal body temperature is too warm for this. As the testicular temperature drops, the testes are drawn closer to the body for additional warmth. As the testicular temperature increases, the testes lower away from the body in order to cool off.

The testes are apart of the [[endocrine]] system, a network in the body that releases [[hormone]]s into the bloodstream. The hormones released by the testes allows the individual to mature through their physical appearance, thoughts, and behavior.<ref>Grison, Sarah, and Michael S. Gazzaniga. ''Psychology in Your Life''. W.W. Norton & Company, Inc., 2017.</ref>

The testes are a part of the [[endocrine]] system, a network in the body that releases [[hormone]]s into the bloodstream. The hormones released by the testes allows the individual to mature through their physical appearance, thoughts, and behavior.<ref>Grison, Sarah, and Michael S. Gazzaniga. ''Psychology in Your Life''. W.W. Norton & Company, Inc., 2017.</ref>

The testes release sex hormones called [[androgen]]s, while the ovaries produce hormones called [[estrogen]]s, mainly "estradiol." Within the class of androgens, a hormone called "[[testosterone]]" increases about 20 times the level it was before [[puberty]].<ref>Roche & Sun, 2003</ref> Though both males and females have estrogen and androgens, it is the increase of estradiol in girls and testosterone in boys that causes the first physical changes during puberty, which are known as "[[secondary sex characteristics]]."

The testes release sex hormones called [[androgen]]s, while the ovaries produce hormones called [[estrogen]]s, mainly "estradiol." Within the class of androgens, a hormone called "[[testosterone]]" increases about 20 times the level it was before [[puberty]].<ref>Roche & Sun, 2003</ref> Though both males and females have estrogen and androgens, it is the increase of estradiol in girls and testosterone in boys that causes the first physical changes during puberty, which are known as "[[secondary sex characteristics]]."