Visitors to this year’s Stanislaus County Fair will be able to take a walk through a giant human heart, play a game that tests their skill at performing surgery and learn about potentially life-saving hands-only CPR. Doctors Medical Center and Emanuel Medical Center have joined together to provide a variety of healthcare-related activities at the fair, which runs from July 14 through 23. Many of the activities will be available only on a special night – Monday, July 17 – jointly sponsored by the two hospitals. The Walk-Through Heart Exhibit, which is especially popular with children, will be on display all 10 days of the fair.