It is founded, in experiments, that thruster overheated make channel wall in red, plume into the color purple, cathode overheating failure, anode breakdown, and etc, even leading to thruster flameout.

The cytoplasmic channel in the wall of adjacent meiocytes was an obvious feature during microsporogenesis in Gossypium hirsutum.

The cells have different sides, and one side must face the wall of the duct and the other must face the inner channel.