The Plastic Organs are key items found in Silent Hill: Origins. Instructional mock-ups of human organs, these items are integral to the completion of the Anatomy Puzzle, found inside the exam room on the first floor of Alchemilla Hospital.
The Plastic Heart is locked inside a medical box located in Room 204. A code must be entered into a keypad to unlock the box. As Travis Grady explores the hospital, three names and numbers are found; these numbers, when ordered from largest to smallest, produce the combination required. The code to the box is 312319, as hinted to in a memo Travis will find attached to the box.
Before the item is retrieved from the box, a heartbeat can be heard.
The Plastic Intestine can be found inside the sink in the exam room.
The Plastic Stomach can be found in a sink adjacent to the one that holds the plastic intestine in the exam room.
The Plastic Liver can be found in the Otherworld iteration of the first floor woman's restroom, floating inside of a water cistern, attached to a toilet. The lid must be removed to retrieve the liver.
The Plastic Lungs can be found inside a box in the Otherworld iteration of room 205.