Category: P

An order of flagellate protozoa. It contains several pathogenic genera including Leishmania and Trypanosoma.  

The study of microorganisms smaller than bacteria, i.e., the viruses.  

Hydrogen with an atomic weight of one.  

One who studies the Protista, the unicellular organisms.  

In taxonomy, a kingdom of organisms that includes the protozoa, unicellular and multicellular algae, and the slime molds. The cells are eukaryotic.  

A precursor cell that matures and differentiates into a functioning T cell in the thymus gland.  

The presence of prothrombin in the blood.  

Plasma that contains only clotting factors II, IX, X (and low levels of factor VII). It is used clinically to reverse the effects of excessive anticoagulation with warfarin.  

An enzyme important in blood coagulation. In a reaction with activated factors X (Xa) and V (Va) in the presence of calcium and platelets, prothrombinase catalyzes the conversion of prothrombin to thrombin.  

A health care professional who helps to design, construct, and adjust artificial limbs and other body parts that assist in mobility, ambulation, and use of the extremities.