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BIOLOGICAL CHANGES IN
ADOLOSCENCE
Adolescence is a change of from biological immaturity
to maturity
• The adolescent growth spurt is one of the earliest signs of puberty.
• At peak height velocity, girls grow at about 3.5 inches/year.
• …boys grow about 4.1 inches/year. • Asynchronicity in growth means that some parts of the body grow faster than others.
• There is a spurt in muscle growth due largely to the increase in testosterone, which is larger in boys.
• Levels of body fat increase during puberty but more for girls than for boys.
• In both boys and girls, the heart becomes larger, heart rate falls and vital capacity of the lungs increases.
• Gender differences exist in cultural expectations for physical activity in many cultures…
BIOLOGICAL CHANGES IN GIRLS
• Increase in height.• Development of fatty and subcutaneous tissues• Broadening of hips• Growth of hair in armpits• Voice becomes shrill• Appearance of breast bud• Onset of menarche
BIOLOGICAL CHANGES IN BOYS
• Increase in height• Development of muscles• Broadening of shoulders• Growth of hair in the armpits , and pubic area and appearance of facial hair• Voice break takes place due to lengthening of vocal cord and enlarging of larynx• Nocturnal emissions take place
Menstruation is a woman's monthly bleeding. When you menstruate, your body
sheds the lining of the uterus (womb).Menstrual blood flows from the uterus
through the small opening in the cervix and passes out of the body through the vagina .
MENSTRUAL CYCLE
Infrequent periods Oligomenorrhea
Short or extremely light periods Hypomenorrhea
Too-frequent periods (defined as more frequently than every 21 days) Polymenorrhea
Extremely heavy or long periods Hypermenorrhea
Extremely painful periods Dysmenorrhea
Breakthrough bleeding alsobetween periods; normal in many females
Metrorrhagia
Absent periods
MENSTRUAL DISORDERS