B2 Cells in the Spleen (image) Max Delbrück Center for Molecular Medicine in the Helmholtz Association Share Print E-Mail Caption The spleen is one of the immunological organs where follicular B cells (blue) and germinal center B cells (green) develop high-affinity antibody responses. In contrast, B1 cells are innate-like B cells and predominantly located in the peritoneal and pleural cavities. Credit Image: Chu Van Trung, MDC Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.