Lymphoid cells are important for the proper functioning of the immune system. These cells help the body to defend against harmful pathogens and diseases. There are several synonyms for lymphoid cells, including immune cells, lymphocytes, lymphoblastic cells, and white blood cells. All of these terms describe the various types of cells that play a crucial role in defending the body against infections. The lymphoid cell family includes B-cells, T-cells, and natural killer cells, among others. These cells work together to fight infections and keep the body healthy. Understanding the different types of lymphoid cells and their functions is essential for maintaining a healthy immune system.