Which statement is true about the maximum lifespan of humans?
A) For people age 65 and older, life expectancy has increased dramatically over the past decade and a half.
B) Gains in average life expectancy are largely the result of reducing health risks in the first 20 or 30 years.
C) The odds of becoming a centenarian are moderate to highin the U.S. population, 100 for every 10,000 people.
D) Researchers agree that we can and should add to human maximum lifespan, which is currently close to 110 years.
Question 2
Once people pass __________ years, the contribution of heredity to length of life decreases in favor of environmental factors.
A) 45 to 50
B) 55 to 60
C) 65 to 70
D) 75 to 80
The lymphatic system in humans.
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An older woman with wrinkled skin, gray hair, and darker teeth, smokes a cigarette.