A bioremodelable prosthesis for treating a patient with a diseased or damaged organs comprising a first layer that contains acid-extracted fibrillar or non-fibrillar collagen, and a second layer derived from the tunica submucosa of the small intestine that provides structural stability, is pliable and is semi-permeable,pe1 59564443.npc wherein the prosthesis undergoes controlled biodegradation occurring with adequate living cell replacement such that the original prosthesis is replaced by the patient's living cells.