Bloods Pathology Histology Lab

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Figure 5 Polycythemia is a condition characterized by an abnormal proliferation of erythrocytes (also known as red blood cells) in the blood. This increased presence of erythrocytes thickens the blood and slows its flow through the body,

Eosinophilia Eosinophils are members of the granulocytic class of white blood cells that function primarily in fighting infections of parasites and in allergic reactions. The cells, which are named for the eosin-staining granules they contain, generally comprise one to three percent of the total white blood cell count in a healthy individual.

Persons who exhibit an abnormally large number of eosinophils are said to have eosinophilia.

Chronic lymphocytic leukemia. These mature lymphocytes are increased markedly in number. They are indicative of chronic lymphocytic leukemia, a disease most often seen in older adults. This disease responds poorly to treatment. Sickle Cell Anemia Due to a genetic mutation in the DNA that codes for hemoglobin, red blood cells take on a flattened or sickle shape. This sickle shape serves as an evolutionary advantage in areas where malaria is present. The shape of the RBC is such that it does not allow the malarial parasite to grow within the human’s RBCs.

Iron deficiency anemia Iron deficiency anemia affects an estimated one in five women and as many as half of all pregnant women. Malabsorption of iron, monthly menstruation and pregnancy can all result in an iron deficiency. Since it is iron that lends hemoglobin its color, the effected blood cells appear pale and somewhat transparent.