Adolescence is called the transitional period in human development, that through intense physical, cognitive, emotional and social changes going from childhood to mature adulthood.
The top and most characteristic feature of adolescence is to puberty, the physical, that is, changes that are transforming the child to sexually mature, able to play adult.
The physical changes that occur during adolescence is the result of a series of endocrine changes including:
1. Maturation of genital organs.
2. Appearance and development of secondary sex characteristics.
3. Speeding along the increase.
4. Changes in body composition, the organs and functions of the agency.
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Maturation Genital SECONDARY FEATURES
The boy:
The first point of entry into puberty is an increase in testicular size and usually in 10 to 14 years. The testicle is gradually increasing and size <2,5 cm reaches 5cm in size in the adult, a process that requires 2-5 years . One year after the swelling of the testicles under the influence of testicular androgens in particular, begins to increase penis size in pre-pubertal than 6cm, reaching an average of 13, 5 cm in the next 2-5 years. Around the age of 14 years appears face, initially in the upper lip at the cheeks and chin and armpit and his voice acquires the characteristics of deep flavor. At the same time shows and the peak increase. About half the boys displayed swelling of the breasts as the 4cm lasting 1-2 years and resolve itself without treatment. Treatment is required only to larger bulges. The girl: The first point of entry into puberty is usually breast enlargement that occurs between 8-13 years. The full development of cancer requires four years. 6-12 months after breast expansion begins development completed in three years. At the age of 12.5 years on average appear trichosis underarm completed in about a year and 1.5 at age 10 -13 years appear first menstruation. Genetic factors (mother and daughter have similar age, menarche) and body weight, exercise, socio -economic contribute to the onset of menarche. The ovaries after the age of eight years before the appearance of any sign puberty have cystic follicles. The uterus begins to grow in size from nine years and enter the vagina adult configuration before breast swelling and concludes with the start of menstrual flow. ACCELERATION OF GROWTH IN LENGTH The annual growth rate in children is a constant 5-6cm a year just before the start of puberty reaches its nadir, followed by a sharp acceleration of puberty. Spurt in boys begins when the testes with volumes 10 ml and lasts 2.5 to 3 years. The average total amount of winning the boys this time is 28cm. The spurt in girls starts earlier, the swelling of the breast and takes 2.5 to 3 years. The average total amounts of the winning girls are 25cm. 
Of course, the average height difference between men and women is 13cm and attributed the difference 3cm, but the fact that the spurt in boys appears about 2 years later to begin the period of rapid growth with improved initial height at 10cm.
CHANGES IN COMPOSITION OF THE BODY, IN ORGANS, FUNCTIONS IN
Muscle mass begins to rise in six years for girls and 9.5 for boys. In boys, however, the increase continues throughout adolescence, while girls stop with menarche. The result is muscle men and muscle power to twice as high for women. Instead, the fat mass increases in girls throughout adolescence, and as women have finally doubled fat mass compared with men.
In boys there is an increase in the size of the heart and lung pressure.
The sharp and sudden physical changes experienced by the teenager, inherited endocrine change, causing feedback. So we all need systematic and responsible information on physical and sexual development of understanding, support and acceptance.
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Posted by: Mckaloy.wordpress.com | 03/31/2011 at 06:34 PM