Age Happens: Aging...It Starts Sooner Than You Think!  

Aging is the pattern of life changes that occurs naturally as people grow older. After the age of about 30 the body begins its slow, inexorable decline, although it will be decades before the real effects become apparent.
Subject: heart
Transcript: an inexorable decline... although it will still be decades before the real effects become apparent. Mat 30, the heart pumps 3. 6 quarts of blood per