Measurement of protoplasmic streaming over the entire body of plasmodium, and estimation of the transport and mixing of protoplasma through the intricate vein network.

Transport networks spanning the entire body of an organism are key infrastructures for achieving a functional system and facilitating the distribution of nutrients and signals. The large amoeba-like organism has gained attention as a useful model for studying biological transport networks owing to its visible and rapidly adapting vein structure. Using particle-tracking velocimetry, we measured the flow velocity of protoplasmic streaming over the entire body of plasmodia during the development of its intricate vein network.