Jordan's Desert Kingdom. Explore an exotic world of kings, intrigue, and treasure. Discover the mysteries of past cultures and immerse yourself in the rich history of the region. In these lands, ancient caravans and Roman legionnaires once ruled.
When the visceral layer comes into contact with heart (not the great vessels) it is known as the epicardium. The epicardium is the layer immediately outside of the heart muscle proper (the myocardium). The epicardium is largely made of connective tissue and functions as a protective layer.he serous pericardium, in turn, is divided into two layers, the parietal pericardium, which is fused to and inseparable from the fibrous pericardium, and the visceral pericardium, which is part of the epicardium.
We are made of star stuff.âCarl Sagan. Almost all of the elements in the universe originated in the high-pressure hearts of stars or during a star's violent death. But some elements are not star stuff.. Hydrogen and helium trace their lineage back to the big bang. Other elements, like francium and plutonium, are only produced in trace amounts by the decay of uraniumâand by trace amounts, I mean that if you gathered all the naturally occurring plutonium in the world, you'd have roughly 0.05 grams of it.