Pathology. Pathology is the precise study and diagnosis of disease. The word pathology is from Ancient Greek ÏÎ¬Î¸Î¿Ï, pathos which may be translated into English as either experience or suffering. and -Î»Î¿Î³Î¯Î±, -logia, An account of or the study of.
Red cells contain a special protein called hemoglobin, which helps carry oxygen from the lungs to the rest of the body and then returns carbon dioxide from the body to the lungs so it can be exhaled. Blood appears red because of the large number of red blood cells, which get their color from the hemoglobin.
The total hemoglobin test estimates the amount of hemoglobin in the blood, and gives an idea of the bloodâs ability to carry oxygen. (Though not part of a CBC, a laboratory technique called electrophoresis may be used to detect the presence of abnormal hemoglobins, which often do not work as well as normal ones.)