The peritoneal cavity is a membrane-bound and fluid-filled abdominal cavity of mammals,
which contains the liver, spleen, most of the gastro-intestinal tract and other viscera. It
harbors a number of immune cells including macrophages, B cells and T cells. The
presence of a high number of naïve macrophages in the peritoneal cavity makes it a
preferred site for the collection of naïve tissue resident macrophages (1). The peritoneal
cavity is also important to the study of B cells because of the presence of a unique peritoneal …