Haemoglobin test reveals if your haemoglobin level is lower or higher than normal. Haemoglobin is the protein molecule in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs. Abnormal Haemoglobin levels is a sign of a blood disorder.  TC is total count or the number of WBC (White Blood Cells) per cubic mm of blood . DC is differential count, which expresses the types of WBCs in the blood. ESR or Erythrocyte Sedimentation Rate is done to determine the presence of one or more types of conditions including infections, tumors, inflammation, and those leading to the breakdown or decreased function of tissue or organs (degenerative), and/or to monitor the progress of disease or effect of therapy.