The walls of arteries and veins are composed of endothelial cells, smooth muscle cells and extracellular matrix (including collagen and elastin). These are arranged into three concentric layers: intima, media and adventitia. The intima is the inner layer abutting the vessel lumen.he walls of arteries and veins are composed of endothelial cells, smooth muscle cells and extracellular matrix (including collagen and elastin). These are arranged into three concentric layers: intima, media and adventitia. The intima is the inner layer abutting the vessel lumen.
The correct phrase is It's not over until the fat lady sinks and has its origins in the game of billiards. The black eight ball was commonly referred to as the fat lady so no matter how bad the game was for a competitor it wasn't over until the fat lady sank.!! Debbie Pollard, Yorkshire uk.
Valeria Levitin is a skeleton with a thin film of skin tightly over her bones. Hundreds of girls worldwide want to look like her, but she would rather be a poster model of how anorexia can destroy your body. Weighing only 55 pounds, Valeria the skinniest woman on earth. She poses in just a bikini for a Russian newspaper, hoping that the results of anorexia would get people away from this debilitating disease. Instead, the fan mail comes in, wondering how she managed to get herself so skinny.