- Prehistoric
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History
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- Earth
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Amphibians
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Animals
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LET'S EXPLORE The animal kingdom
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Birds
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Domestic animals
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Ecosystems
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Fish
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Human body
- Human body
- Blood
- Body chemistry
- Brain
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Growth and development
- Heart
- Immune system
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- Skeleton
- Skin, hair and nails
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- Why do we sleep?
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- Why do our ears pop when we fly in a plane?
- Why do we breathe faster when we run?
- Why do you feel dizzy when you spin around?
- Why do we have hiccups?
- Human body A-Z
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LET'S EXPLORE The human body
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Insects
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Land invertebrates
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LET'S EXPLORE Mini-beasts
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Life
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Mammals
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Marine invertebrates
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Micro-organisms
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Ocean life
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Plants
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Reptiles
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LET'S EXPLORE The living world
Human body


CITE
We have made every effort to follow citation style rules, but there may be some minor differences. If in doubt, please refer to the appropriate citation style manual.
Growth and development. (2014). In Q-files Encyclopedia, Life, Human body. Retrieved from
https://www.q-files.com/life/human-body/growth-and-development/
"Growth and development." Life, Human body, Q-files Encyclopedia, 15 Dec. 2014.
https://www.q-files.com/life/human-body/growth-and-development/.
Accessed 12 Dec. 2019.
Growth and development 2014. Life, Human body. Retrieved 12 December 2019, from
https://www.q-files.com/life/human-body/growth-and-development/
Life, Human body, s.v. "Growth and development," accessed December 12, 2019.
https://www.q-files.com/life/human-body/growth-and-development/

Growth and development
Child, parent and grandparent
For the first 15 to 20 years after birth, the human body grows in weight and height. This growth is controlled by hormones, which are chemical signallers controlled by the brain. Other changes take place in the human body as we go through life. Puberty or adolescence is when a child’s body experiences a series of physical changes as it matures into an adult’s body capable of sexual reproduction. Almost as soon as the body is mature, the process of ageing, or senescence, begins. The way in which individuals grow, develop and age is dependent on factors such as genes, diet, lifestyle and environment.
Growth
At birth, the average baby weighs about 3.5 kilograms (7 pounds 11 ounces) and is around 50 centimetres (20 inches) long. Humans grow fastest between the ages of 0 and 2, then at a slower but steady rate until puberty. A growth spurt starts usually at around 11–12 years old in girls and 13–14 in boys. The rate of growth then slows to zero, usually by about the age of 16 in girls and 18 in boys. The ages at which young people begin and end their growth spurt can vary widely between individuals.


The tallest nation is the Netherlands, where the average man is 6 ft (185 cm) tall. The shortest nation is Indonesia, where men are 158 cm (5 ft 2 inches) tall on average.

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