Microspheres are tiny spherical particles that typically range in size from 1 to 1000 micrometers. They can be made from various materials, including polymers, glass, and ceramics. Due to their small size and large surface area, microspheres are used in a variety of applications, such as drug delivery, diagnostics, and as fillers in cosmetics. In the medical field, microspheres can be used to encapsulate drugs, allowing for controlled release into the body. They are also utilized in biotechnology for cell culture and in environmental science for pollutant removal. Their versatility makes them valuable in both research and commercial products.