The pericardium is a sac of fibrous tissue that surrounds the heart and the roots of the large blood vessels. Visceral pericardium is the inner layer of the pericardium sac.he visceral pericardium is the inner-most layer of the pericardium, and is also known as the Epicardium as it lays upon the heart.
Similarly wobbly views on sex and adolescentsâor rather sex with adolescentsâare on profligate historical display elsewhere. It goes in the opposite direction, too. The age of consent in 1920s Chile was 20, but now it's 16. A century ago in Italy, it was 16, too. But today it's 14 there.
1 Age: In 2010, nearly three-quarters of Seattle residents were adults between 18 and 64 years of age, with an especially high concentration of young adults (age 25 to 34). 2  The highest rates of population growth between 2000 and 2010 were for children under 5 and adults age 55 to 64.