Marasmus is a form of severe malnutrition characterized by energy deficiency. A child with marasmus looks emaciated. Body weight is reduced to less than 60% of the normal (expected) body weight for the age.Marasmus occurrence increases prior to age 1, whereas kwashiorkor occurrence increases after 18 months.arasmus is a form of severe malnutrition characterized by energy deficiency. A child with marasmus looks emaciated. Body weight is reduced to less than 60% of the normal (expected) body weight for the age.
Heath and Aging. In 2010, an estimated 524 million people were aged 65 or olderâ8 percent of the worldâs population. By 2050, this number is expected to nearly triple to about 1.5 billion, representing 16 percent of the worldâs population. Although more developed countries have the oldest population profiles, the vast majority of older peopleâand the most rapidly aging populationsâare in less developed countries.
Demographics of the World 2016. As of 1 January 2017, the population of the world was estimated to be 7 486 520 598. This is an increase of 1.20 % (88 744 236 people) compared to population of 7 397 776 362 the year before. In 2016 the natural increase was positive, as the number of births exceeded the number of deaths by 88 545 673. Below are the key figures for the world population in 2016: 146 469 220 live births.