5 Medical preparations for the treatment, reconstruction, recontouring, repair or augmentation of human tissue for use in general, plastic and reconstructive, urological, gynecological, orthopaedic, gastro-oesophageal, anal, colorectal and abdominal surgery; medical preparations for the treatment, reconstruction, recontouring, augmentation of human tissue formed of or using natural collagen-containing tissue materials; surgical and medical implants in injectable and non-injectable form prepared from natural collagen-containing tissues; surgical implants comprising living tissue; biological implants, namely, avital processed human or animal tissue; biological tissues, namely, skin, blood vessel, bone, ligament, tendon, nerve, gastrointestinal tract, heart, liver, kidney, pancreas, spleen, bladder, urethra and ureter tissues, intended for subsequent implantation