The biological modifications of the adolescents vary the sex in accordance with. In the girls they occur to the 12 and in the boys they occur to the 13 years of age. In the feminine sex the changes are characterized for the sprouting of the ones for the ones in diverse places of the body (in the armpits and around of the genital agency), the development of the seios, the matureness of the sexual agencies, that is, the penis and the testicules acquire the adult size. With the advance of the puberty, for the ones in the genital agency they increase, the shoulders become wider than the hips and the muscles if they develop. It is in period of the adolescence that the adolescents possess the first ejaculao. This means that it already possesss sexual maturation, that is, can generate children. The adolescence is distinguished over all for psychological modifications, that is, in the mind of the human beings. These alterations propitiate relative changes to the behavior and interests.
In the adolescence the adults and the familiar ones start to charge more maturity, more responsibility in the studies and its actions. It is in this stage of the life that the adolescents search autonomy, financial independence and generally questions the values of the society and the rules. Therefore, it is normal the citizens of this phase to rebel against the established norms, because the individuals in the adolescence if they guide for its proper ones feelings and ideas. The authors previously cited (Carlos Barros and Paolino) mention on the biological and mental changes, however they leave to stand out the consequences of the biological transformations in the society. To explicitar this ideology, can be mentioned Pink Merval (1988, p 66): The biological modifications that occur during the adolescence provoke consequences in relation to its auto-concept and its social life. To reaffirm this conception, it can be approached as example: the young that develops its musculatura precociously can practise definitive types of sport and, had this development, it can receive from its colleagues of the adults, activities that are carried through only by more advanced citizens in the age.