There is always one nucleus and one vacuole, but both may be more numerous.
We have received the impression that we have here to deal with a vacuole filled with substance secreted by the cell.
The number of the vacuole containing cells is 15-20% of the colourless blood corpuscles.
At each end of the cell is a vacuole containing small granules that show an active dancing movement.
These masses of food seem to be inclosed within a little area containing fluid, called a vacuole.
This is done by pulsation of the vacuole, which ultimately bursts, passing fluid waste to the outside.
Later on this vacuole disappears, and the grains of pigment make their appearance.