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.
Miss Piggy is the ultimate diva, a fashion icon, a star of stage, screen, and all media known and unknown in perpetuity throughout the universe. Miss Piggy has an appetite for the good things in life, including chocolate, jewelery and, above all, her one true love, Kermit.