Macrophages found in the intestine are called what?

• A. Mesentery cells
• B. Kupffer cells
• C. Microglia
• D. Alveolar macrophages

Answer: (A)

Macrophages in gut-associated tissues are specialized to keep tolerance to gut microbes while defending against pathogens. In the intestinal mesentery, the resident macrophage population is described as mesenteric macrophages, or mesentery cells. These cells sit in the connective tissue supporting the intestines and are part of the mucosal immune system. They actively phagocytose bacteria and debris, clear apoptotic cells, and secrete cytokines to regulate inflammation, helping maintain a balanced immune response in the gut environment. For contrast, other macrophage types are named by their tissue of residence—Kupffer cells in the liver, microglia in the brain, and alveolar macrophages in the lungs—so the macrophages associated with the intestine are appropriately called mesenteric (mesentery) macrophages.