Microphysiological Systems (MPS) are advanced laboratory models that mimic the functions of human organs and tissues. They use living cells to create miniature versions of biological systems, allowing researchers to study how these systems respond to various stimuli, such as drugs or diseases, in a controlled environment. These systems are valuable for drug development and toxicology studies, as they provide insights that traditional methods cannot. By replicating the complex interactions within the human body, MPS can help predict how new treatments will perform in real patients, potentially speeding up the process of bringing new therapies to market.