The blood plays many important roles in coordinating the individual cells in to a whole complex organism. Hence, the blood is being studied extensively by the physiologists, bio- chemists and bio-medical engineers, but it has not drawn much attention of physicists. However some reports are available on ultrasonic, dielectric and dielctrophoretic properties of human blood and its erythrocytes. Keeping this in view, the main aim of this thesis to investigate clinical parameters such as erythrocyte count, leukocyte count, platelet count, hemoglobin content, pH and ESR; and biophysical aspects...