Ageing - Dividing the lifespan

Ageing or aging is the process of becoming older. This article focuses on the social, cultural, and economic effects of ageing. The biology of ageing is treated in detail in senescence. Ageing is an important part of all human societies reflecting the biological changes that occur, but also reflecting cultural and societal conventions. Age is usually, but wholly arbitrarily, measured in years and a p ...

Including:

• Ageing - Senescence: the biology of ageing
• Ageing - Dividing the lifespan
• Ageing - Age and the law
• Ageing - Economics and marketing of ageing
• Ageing - Cultural variations
• Ageing - Global ageing trends
• Ageing - Reference

Read more here: » Ageing: Encyclopedia - Ageing

A human life is often arbitrarily divided into various ages. Because biological changes are slow moving and vary from person to person arbitrary dates are usually set to mark periods of human life. In some cultures the divisions given below are quite varied. In the USA and other countries, adulthood legally begins at the age of eighteen or nineteen, while old age is considered to begin at age sixty-five. Infancy Toddler Childhood Preteen Adolescence Young adult Adult ...

See also:

Ageing, Ageing - Senescence: the biology of ageing, Ageing - Dividing the lifespan, Ageing - Age and the law, Ageing - Economics and marketing of ageing, Ageing - Cultural variations, Ageing - Global ageing trends, Ageing - Reference

Read more here: » Ageing: Encyclopedia II - Ageing - Dividing the lifespan

Main article: Senescence In biology, senescence is the state or process of ageing. Cellular senescence is a phenomenon where isolated cells demonstrate a limited ability to divide in culture. Organismal senescence is the ageing of organisms. Organismal ageing is generally characterized by the declining ability to respond to stress, increasing homeostatic imbalance and increased risk of disease. Because of this, death is the ultimate consequence of ageing. Some researchers are treating ageing as a "di ...

See also:

Ageing, Ageing - Senescence: the biology of ageing, Ageing - Dividing the lifespan, Ageing - Age and the law, Ageing - Economics and marketing of ageing, Ageing - Cultural variations, Ageing - Global ageing trends, Ageing - Reference

Read more here: » Ageing: Encyclopedia II - Ageing - Senescence: the biology of ageing

Considerable numbers of cultures have less of a problem with age compared with what has been described above, and it is seen as an important status to reach stages in life, rather than defined numerical ages. Advanced age is given more respect and status. ...

See also:

Ageing, Ageing - Senescence: the biology of ageing, Ageing - Dividing the lifespan, Ageing - Age and the law, Ageing - Economics and marketing of ageing, Ageing - Cultural variations, Ageing - Global ageing trends, Ageing - Reference

Read more here: » Ageing: Encyclopedia II - Ageing - Cultural variations

There are variations in many countries as to what age a person legally becomes an adult. In the United States there are issues such as voting age, drinking age, age of consent, age of majority, age of criminal responsibility, marriageable age, age where one can hold public office, and mandatory retirement age. Admission to a movie for instance, may depend on age according to a motion picture rating system. Similarly in the United States in jurisprudence, the defence of infancy is a form of defence by which a defendant argues th ...

See also:

Ageing, Ageing - Senescence: the biology of ageing, Ageing - Dividing the lifespan, Ageing - Age and the law, Ageing - Economics and marketing of ageing, Ageing - Cultural variations, Ageing - Global ageing trends, Ageing - Reference

Read more here: » Ageing: Encyclopedia II - Ageing - Age and the law

The economics of ageing are also of great import. Children and teenagers have little money of their own, but most of it is available for buying consumer goods. They also have considerable impact on how their parents spent their money. Young adults are an even more valuable cohort. They often have jobs with few responsibilities such as a mortgage or children. They do not yet have set buying habits and are more open to new products. The young are thus the central target of marketers. Television is programmed to attract the 15 to 35 year ...

See also:

Ageing, Ageing - Senescence: the biology of ageing, Ageing - Dividing the lifespan, Ageing - Age and the law, Ageing - Economics and marketing of ageing, Ageing - Cultural variations, Ageing - Global ageing trends, Ageing - Reference

Read more here: » Ageing: Encyclopedia II - Ageing - Economics and marketing of ageing