Cellular refers to anything related to cells, which are the basic building blocks of all living organisms. In biology, cells perform essential functions, such as energy production, growth, and reproduction. There are two main types of cells: prokaryotic cells, which are simple and lack a nucleus, and eukaryotic cells, which are more complex and contain a nucleus. In technology, "cellular" often describes mobile communication systems that use a network of cell towers to transmit signals. This allows devices like smartphones to connect to the internet and make calls wirelessly. Cellular technology has revolutionized how we communicate and access information on the go.