User:Svenables1234/sandbox/life span

lifespan ‎(plural lifespans) 1.The length of time for which an organism lives. [quotations ▼] Some clams have lifespans far longer than those of human beings. 2.(by extension) The length of time for which something exists or is current or valid. life spAN physical development: Adolescence 9-18 years.

This life stage is the change from childhood to adulthood.

Physical development: Physically during this life stage girls and boys start puberty. During puberty, physical changes prepare the body for sexual reproduction. See table for information about the physical changes hat take place.

Female changes. Male changes. Breast development	Facial hair grows Public hair grows 	Public hair grows Weight gain	Growth spurt Growth spurt	Growth of penis and testes Periods start	Voice deepens These physical changes are due to the growth and maturity of the reproductive organs. The reproductive organs produce hormones, which initate secondary sex charactistics. The changes have a great effect on the developmental areas of the adolscent. Intellectual development: During this life stage, adolescents study for formal examinations at school and may choose to study further subjects at the age 16. Vocabulary increases and as young people start to develop a sense of values and beliefs they may question the world around them. Adolescence can be a very impresssionable age young people often make lifestyle choices that have positive or negative effects on their future