Microfluidics: Microfluidics is an interdisciplinary field that focuses on the precise control and manipulation of fluids at the microscale, typically in channels with dimensions ranging from tens to hundreds of micrometers. In biomedical engineering, microfluidics has emerged as a powerful platform for advancing diagnostics, drug delivery, tissue engineering, and single-cell analysis. Our research group focus on three major topics : 1) Microfluidic mass production of artificial exosomes, 2) Microfluidic isolation and separation of biological active particles such as tumor-derived exosomes, 3) organoids and organ-on-a-chip for drug screening (https://sites.google.com/dongguk.ac.kr/kwakslab/home). The integration of microfluidics with other technologies, such as biosensors, microfabrication, and artificial intelligence, continues to expand its potential in biomedical research and clinical applications.