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.
The 1951 Bowman Willie Mays, No. 305, is considered the Baseball Hall of Famer's rookie card. ( ) The Encino, Calif., home of actor and comedian Rob Schneider was broken into over the weekend, and jewelry and watches were among the items stolen. But the most valuable item taken was a Willie Mays baseball card worth $175,000. The 1951 Bowman card is the first baseball card for Mays - known in the collecting world as his rookie card - and is in mint condition, TMZ reported.