Biological tissue grafts, namely bioresorbable grafts for use in tissue regeneration; biological skin bioresorbable grafts for use in surgery; medical plasters; medical and wound dressings; skin grafts, plasters and dressings all being for use in burn and wound care; plasters and dressings all being for use in chronic or acute wound care; biological bioresorbable tissue grafts and bioresorbable implants comprised of living tissue for use in soft tissue repair; surgical slings being tissue imp...