👉 An urn is a container used to store or hold objects. It can be either a solid, hollow, or metallic object, and it is usually made of metal or plastic. Urns are commonly used in various contexts, such as scientific experiments, medical research, and storage of artifacts. In the context of biology and medicine, an urn is often used to store living organisms, such as blood cells, tissues, and organs. It is a common tool for studying the behavior and physiology of these organisms