Abstract: The invention provides an article of manufacture comprising a substantially native xenogeneic knee meniscal cartilage heterografts for implantation into humans. The invention further provides a method for preparing a substantially native xenogeneic knee meniscal heterograft by removing at least a portion of a meniscus from a non-human animal to provide a heterograft; and washing the heterograft in saline and alcohol. In accordance with the invention the heterograft has substantially the same mechanical properties as the native xenogeneic meniscus.