Life expectancy is defined as what, and what factors influence it?

Prepare for the JCJC Human Growth and Development Test. Our quiz includes flashcards, multiple choice questions, hints, and explanations. Enhance your readiness and succeed!

Life expectancy is the average number of years a person born today is expected to live, based on current mortality patterns. It reflects the overall health and living conditions of a population. Genetics set some baseline health risks, but many factors shape how long people live: lifestyle choices such as diet, exercise, smoking, and alcohol use; access to quality healthcare and preventive services; socioeconomic status, which influences nutrition, housing, education, and stress; and the environment, including pollution and safety. Improvements in early-life health and medical care can raise the average, while disparities in any of these areas can lower it. Remember, life expectancy describes a population average and does not predict an individual’s lifespan, nor is it the maximum possible lifespan or something a person plans for themselves.