Light microscopy of blood flow in tadpole tail capillaries. This is a common toad (Bufo bufo) tadpole, a living specimen under the microscope. Different kinds of blood cells are seen flowing through the capillaries. The tadpoles were unharmed by the preparation and released back again later. Filmed with differential interference contrast. Captured field width: 0.53 mm. Magnification on Sensor: x68.