Answer: The human body stores polychlorinated biphenyls (PCBs) in the liver.
Explanation: Polychlorinated biphenyls (PCBs) are a group of synthetic organic chemicals that were widely used in various industrial applications, such as electrical equipment, hydraulic fluids, and plasticizers. Although the human body does not have a natural mechanism to excrete PCBs efficiently, it can store them in certain tissues. The primary organ responsible for storing PCBs is the liver. PCBs are lipophilic compounds, meaning they have an affinity for fat tissues. Once PCBs enter the body, they are metabolized and transported to the liver, where they can accumulate over time. The liver acts as a major storage site for PCBs, along with adipose (fat) tissues. This accumulation in the liver can have harmful effects on liver function and overall health. While small amounts of PCBs can be found in other tissues, the liver is the primary organ where they are stored in the human body.