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an increase in the content of water in the blood.
There are two distinguishable forms of hydremia— hydremia proper and hydremic plethora. Hydremia proper is the increase of the fluid component of the blood without an increase in the total mass of the blood. It usually arises after the loss of blood, when the volume of blood has been lowered for some time, but as a result of the rapid entry of water into the bloodstream from the tissues its proportional content in the blood increases. Hydremic plethora, which is accompanied by a significant increase in the blood mass, develops from the excessive introduction of fluid into the body upon impairment of the excretory function of the kidneys, during resolution of major edemas or ascites, and with some forms of anemia.