A set of genetic determinants located on a single chromosome.
A subclass of T-cells which provide help (in the form of cytokines and/or cognate interactions) necessary for the expression of effector function by other cells in the immune system
The study of the diagnosis, pathology, and treatment of diseases of the blood, blood-forming tissues and organs.
Lysis of erythrocytes with the release of hemoglobin.
A substance that interferes with blood clotting.
Vasoactive amine present in basophil and mast cell granules which, following degranulation, causes increased vascular permeability and smooth muscle contraction.
A drug that dilates blood vessels.