In the movie "Body Parts," the concept revolves around the transplantation of human body parts. While the film does not list a specific set of 20 parts, common human body parts that could be referenced include: head, arms, legs, hands, feet, fingers, toes, eyes, ears, nose, mouth, heart, lungs, kidneys, liver, stomach, spine, skin, brain, and blood. These parts play crucial roles in the story as the protagonist grapples with the psychological and physical implications of receiving transplanted limbs from a serial killer.

The human body has 79 recognized organs, which include major organs like the heart, lungs, liver, kidneys, and brain. Other organs include the stomach, intestines (small and large), bladder, skin, pancreas, spleen, gallbladder, and various glands (like the thyroid). There are also less commonly mentioned organs such as the appendix, adrenal glands, and reproductive organs (ovaries and testes). Each organ plays a vital role in maintaining bodily functions and overall health.

In the movie "Body Parts," the organ that is prominently featured on the right side is the hand. The film revolves around a man who undergoes a limb transplant after losing his arm in an accident. He receives a new arm from a serial killer, which leads to disturbing consequences as he begins to experience the killer's memories and urges. The story explores themes of identity and the psychological impacts of receiving body parts from another person.

In the context of the movie "Body Parts," body parts refer to the physical segments of the human body, such as limbs, organs, and tissues. The film explores themes of identity and the ethics of medical experimentation, as a man receives a transplant of limbs from a serial killer, leading to a series of disturbing events. The title reflects the central premise of how these body parts can influence behavior and identity, raising questions about what makes us who we are.