Definition of Periosteum. It is a dense fibrous membrane made up of irregular connective tissue that covers the external surface of the bones. It is completely opposite to endosteum that lines the inner cavity of long bones.t mainly comprises of the following two layers: 1  Outer fibrous layer: It is composed of collagen-producing cells called fibroblasts and contains nerve fibers that cause pain when damaged due to the presence of nociceptive nerve endings.
Dealer Says He Doctored Most Valuable Baseball Card Ever Sold. A rare example of the 1909 Honus Wagner baseball card. In 2007, one of them fetched a whopping $2.8 million. A rare example of the 1909 Honus Wagner baseball card. In 2007, one of them fetched a whopping $2.8 million. A judge has rejected a plea agreement from the former head of a sports memorabilia auction house who admitted to using shill bidders to drive up prices and to altering the most valuable baseball card ever sold.
How much are Nolan Ryan baseball cards worth? In 1974, Ryan earned a place in the Guinness Book of World Records for fastest pitch recorded when he threw a 100.9 mph fastball against the Detroit Tigers. The record currently belongs to Aroldis Chapman who threw a 105.1 mph pitch in 2010 against the San Diego Padres. Nolan Ryan currently holds the Major League Baseball records for most career strikeouts (5,714), most career no-hitters (7) and holds the single-season strikeout record with 383 in 1973.