The invention is to articles made from extracellular matrix sheets that encase biodegradable polymeric material. Methods of healing wounds or regenerating tissue at sites of defect by placing said articles in mammals are claimed. The biodegradable polymer can change quality upon contact with a physiological parameter such as temperature or pH that causes, for example, a liquid polymer to gel or harden. The degradation of the polymer can be controlled to suit a tissue regeneration or wound healing time course. Additional components such as proteins, cells and drugs can be added to the biopolymer composition.