Changes at puberty:
Sudden increase in height.
Broadening of shoulders and widening of chest in boys. In girls, the region below waist becomes wider.
At puberty, the voice box or the larynx begins to grow. Boys develop larger voice boxes. The growing voice box in boys can be seen as a protruding part of the throat called Adam’s apple. In girls, the larynx is hardly visible from the outside because of its small size. Generally, girls have a high pitched voice, whereas boys have a deep voice.
In girls, breasts begin to develop at puberty and boys begin to grow facial hair, that is, moustaches and beard. Boys also develop hair on their chest. In both, boys and girls, hair grows under the arms and in the region above the thighs or the pubic region.
Appearance of acne as a because of the increased activity of sweat glands and sebaceous glands in the skin.
Testis grows and starts producing sperms in males, whereas in females, the ovary enlarges and starts producing matured eggs.