Changes

== The Reproductive System ==

== The Reproductive System ==

The reproductive system is unique among the organ systems. The organs of this sys- tem vary greatly between the sexes. Male and female children do not differ remarkably in body form until they reach the age of puberty. At this time, under the influence of hormones, striking changes occur in several systems. The voice gradually changes in the male to a deeper masculine tone; the beard becomes a little stronger; pubic, axillary and body hair develop; and the body gradually assumes the characteristics of the adult male. The body form of the adult male develops increased musculature, with broader shoul- ders and narrow hips. The female at puberty develops a feminine contour due largely to deposition of subepidermal fat and she mammary glands become larger. The internal and external genitalia approach maturity, and the gonads begin to produce mature sex cells.

The reproductive system is unique among the organ systems. The organs of this sys- tem vary greatly between the sexes. Male and female children do not differ remarkably in body form until they reach the age of puberty. At this time, under the influence of hormones, striking changes occur in several systems. The voice gradually changes in the male to a deeper masculine tone; the beard becomes a little stronger; pubic, axillary and body hair develop; and the body gradually assumes the characteristics of the adult male. The body form of the adult male develops increased musculature, with broader shoul- ders and narrow hips. The female at puberty develops a feminine contour due largely to deposition of subepidermal fat and she mammary glands become larger. The internal and external genitalia approach maturity, and the gonads begin to produce mature sex cells.