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Structural Changes in the Body

Structural Changes in Male : -
Increase in height (the average height of men in India is 5.6)
The boys begin their adolescent growth spurt at an average of about 10 Years and attains maximum at the age of 18.

During periods of rapid growth, the body needs extra nutrition. Girls in particular need iron, calcium, and protein. Both boys and girls need three balanced and nutritional meals a day and they need to eat healthy snacks. Problems can arise in adolescent nutrition when skipping meals, going on crash diets, and partaking in junk food bingeing.


Graph showing velocity curve for height in boys and girls, from birth to 18 yrs


What is the everage adult height of human beings over the world ?


Worldwide, the average adult male height is approximately 165 cm (5'5"), and the average adult female height is approximately 154 cm (5'1").


Voice Change

Under the influence of androgens, the voice box, or larynx, grows in both genders. This growth is far more prominent in boys, causing the male voice to drop and deepen. Full adult pitch is attained at an average age of about 15 years. When the larynx grows larger during puberty, it sticks out at the front of the throat. This is what's called an Adam's apple.


Male Musculature and Body Shape

By the end of puberty, adult men have heavier bones and nearly twice as much skeletal muscle. Some of the bone growth.


Example : Shoulder width and jaw is disproportionately greater, resulting in noticeably different male and female skeletal shapes.



Structural Changes Female : -

  • Changes in Height (The average height of female in India is 5’2”)
  • The girl begins her adolescent growth spurt at an average of about 10 years and grows at peak velocity at about 12 years, attains her adult height at about 16 years.
  • Underarm (axillary) hair growth visible
  • Body odor and Pimples

Rising levels of androgens can change the fatty acid composition of perspiration, resulting in a more "adult" body odor. As in girls, another androgen effect is increased secretion of oil (sebum) from the skin and the resultant variable amounts of acne and pimples. This can be prevented or diminished by antibacterial face washes and by reducing the intake of high fat content in food. It is fully diminished at the end of puberty. Over sweat secreted by the sweat glands is also one among the change.

  • Body shape, fat distribution, and body composition

During this period, also in response to rising levels of estrogen, the lower half of the pelvis enlarges in size and thus hips widen (providing a larger birth canal).

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