What is the name of the shell that covers the green euglena?

Euglena green, like any unicellular organism, is covered with a membrane. This shell is called a pellicle. It performs a protective function, it is also needed for energy metabolism, exchange of substances with the environment, reproduction, and so on. Euglena green is a representative of the kingdom of protists. Its peculiarity is not in the shell, but in the presence of autotrophic nutrition. It is provided by chloroplasts, that is, it is capable of photosynthesis. A thin and transparent pellicle allows good sunlight to pass through for photosynthesis.