This absolutely true.
The poor in America cannot afford nutritional food, healthcare and they live in dire situations. Crime and gangs are rampant amongst poorer neighborhoods which leads to homicide and drug taking, both of which impact on the life expectancy of people.
It depends on how fit/active they are but there is no set amount I would say at least 10
Answer: The innermost layer of the small intestine is made up of epithelial cells and contains four layers; mucosa, submucosa, muscle layer, and adventitia.