Caption: Mast cell. A type of immune cell in lymph or connective tissues (related to basophils in the blood) that produces histamine. Is the one of the first defense mechanisms in an allergic reaction. Once the mast cells are sensitized against the foreign invader they can react more swiftly in the future when this foreign invader is present. Found in the skin, tongue, lungs and linings of the nose and intestine.
Magnification*: x1,200
Type: SEM
Keywords: 20265C.TIF human body blood human white blood cell mast cell basophil basophils granulocytic granulocyte immune response allergenic allergen histamine lymph connective tissue leukocyte SEM |

*(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)