Movement of erythrocytes in the capillaries of the rat and of the frog (original image). Development of erythrocytes from an erythroblast (special effects). Demonstration of the fluidity of hardened and untreated erythrocytes as well as a concentrated erythrocyte suspension (original image): Physical conditions of flow (shear, shear stress, shear rate). Development of laminar flow (special effects). Observation of erythrocytes in counter-rotatory coaxial-cylinder rheometer. Demonstration of orientation, deformation, membrane rotation and internal circulation of erythrocytes (original image, special effects). Flow behaviour of erythrocytes in glass and physiological capillaries (original image).