What is aging?, A sudden illness, A natural process of gradual body changes, A type of exercise, A childhood stage, What happens to the skin as people age?, It becomes thicker, It stops changing, It becomes stronger, It becomes thinner and less elastic, What happens to muscles and bones with age?, Muscles weaken and bones become more fragile, Bones become unbreakable, Muscles disappear suddenly, Bones become bigger, Which organ becomes less efficient at filtering waste?, Brain, Skin, Kidneys, Stomach .

aging process

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