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Chapter 14 Chapter 14 Physical Development and  Health in Adolescence This multimedia product and its contents are protected under copyright law. The following are prohibited by law: •Any public performance or display, including transmission of any image over a network; •Preparation of any derivative work, including the extraction, in whole or in part, of any images; •Any rental, lease, or lending of the program.
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Adolescence Adolescence Typically defined as the period from 11 to 19  years of age Early adolescence: 11-14 years Late adolescence: 15-19 years
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Historical Perspectives on Historical Perspectives on Adolescence Adolescence In the mid-19 th  century, social and legal  reforms contributed to our current  conception of adolescence
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Historical Perspectives on Historical Perspectives on Adolescence Adolescence Postponing adult responsibilities gave  young people increased time to explore  roles and values
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Brain Development Brain Development Several systems undergo changes thought to be  associated with adolescent cognitive changes Amygdala Prefrontal cortex Limbic system  
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Brain Development Brain Development Physical changes in the brain may help  account for adolescents’ Risk-taking and independence-seeking Alcohol and drug use Lack of foresight Failure to recognize consequences of actions
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The Adolescent Growth Spurt: The Adolescent Growth Spurt: Girls Girls Girls begin the growth spurt at about 10 ½  years Menarche The onset of the menstrual cycle
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The Adolescent Growth Spurt: The Adolescent Growth Spurt: Boys Boys Boys begin the growth spurt at about 12 ½   years Adult height is reached at about 17-18 years Boys put on more muscle mass than girls do
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Puberty Puberty Puberty Developmental milestone reached when a  person becomes sexually mature and capable  of having children
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Puberty Puberty Primary sexual characteristics Physical features directly related to  reproduction Secondary sexual characteristics Features that are outward manifestations of  sexual development but are not directly  involved in reproduction E.g., facial and body hair
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