Definition
Mast cells are specialized immune cells found in tissues throughout the body, especially near blood vessels and nerves. Think of them as tiny security guards 👮♀️ stationed at various points. They release substances like histamine during allergic reactions 🤧, playing a crucial role in inflammation. They originate from bone marrow and migrate to tissues. They are involved in wound healing and immune defense. While beneficial, overactive mast cells cause allergies. They contain granules filled with inflammatory mediators.