UNIT 2 PHYSIOLOGY PSYCHOLOGY AND PUBERTY Puberty: Definition: Puberty is the period that generally connects childhood with adulthood and the gradual development of secondary sexual characteristics in the body of the human being. Age of Puberty:Age of puberty is different in boys and girls. Puberty in gals usually ranges from 10 years to 14 years. While in boys the age of puberty ranges from 12 years to 16 years. Changes