Define adolescence and identify the major physical changes that occur during this period of life

Define adolescence and identify the major physical changes that occur during this period of life.

Adolescence is accompanied by many changes: physical, psychological, emotional, sexual.

  Examples of typical changes in boys include:

     - The enlargement of the shoulders and torso;
     - The transformation of the voice;
     - The development of hair (torso, arms, face);
     - The development of the genital organs;
     - The first erections.

And on the girls side :

     - Breast development;
     - The onset of menstruation;
     - The enlargement of the hips