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.
Claudia Alta Taylor âLady Birdâ Johnson served as First Lady of the United States (1963â1969) as the wife of President Lyndon B. Johnson. A shrewd investor and manager, she broke ground for the role by interacting with Congress directly and advocating strongly for beautifying the nationâs cities and highways.