Yes, mast cells are a type of white blood cell (WBC).
Mast cells are granulocytes, a type of white blood cell that contains granules rich in histamine and heparin. These cells reside in various tissues throughout the body, especially near blood vessels, nerves, and lymphatic vessels, as well as in the skin, lungs, and intestines. Their primary function is to mediate inflammatory responses, particularly in allergic reactions and defense against pathogens. While they circulate in the blood like other WBCs, they primarily reside in tissues.
