The scope of a ghoulish scheme to sell human body parts has expanded, as prosecutors yesterday announced plea deals with seven New York-area funeral home directors.

The directors, who were not named, pleaded guilty to charges implicating them in a large-scale procurement conspiracy to secretly harvest bones and tissue from unknowing donors, the Brooklyn district attorney announced.

The criminal enterprise was first disclosed in February, when prosecutors charged the owner of BioMedical Tissue Services, Michael Mastromarino, with orchestrating the illegal procurement and sale of body parts. An initial indictment implicated Mr. Mastromarino, Joseph Nicelli, Lee Cruceta, and Christopher Aldorasi, all of whom pleaded not guilty yesterday to a new indictment based on the expanded investigation.

Prosecutors yesterday added new allegations to an initial investigation that focused on the Daniel George & Sons Funeral Home in Brooklyn, previously owned by Mr. Nicelli. Earlier, prosecutors said the defendants secretly removed skin, bone, and other parts from as many as 1,000 bodies, earning millions of dollars by selling the tissue to biomedical companies that are legitimate suppliers for implant and replacement procedures.

A new indictment alleges that at least 14 bodies also were plundered at funeral homes in Manhattan, the Bronx, and Rochester, N.Y. Attorneys said that among the directors cooperating was the head of a funeral home that stole parts from the body of the host of “Masterpiece Theatre,” Alistair Cooke, who died in 2004. “It is clear that many more funeral home directors were involved in this enterprise,” the Brooklyn district attorney, Charles Hynes, said at a news conference.

At the same news conference, Elizabeth Johnson of Newton, Mass., described her shock and concern that her sickly, 67-year-old cousin’s body was secretly carved up for parts in 2003. “It’s a terrible thing to do to somebody’s body,” she said.