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04_Euglena.gif Euglena nucleus nucleus nucleus nucleus nucleus

Euglena (low power-no map)

Two Euglena with visible chloroplasts Nucleus Nucleus Chloroplasts Chloroplasts

Euglena with visible flagellum Flagellum Nucleus

Several Euglena with visible flagella-no map


Originally, there were two subsections in the Protist (a/k/a Protoctista) kingdom: the Phylum_Protozoa (the animal-like protists) and the Division_Algae (the plant-like protists). Both groups were previously members of the animal and plant kingdoms, respectively. When you study zoology and botany, these groups will be included in the review of the animal and plant kingdoms. Since the early days of the Protist kingdom in the 1800’s a few more groups have been added to the kingdom, including the fungus-like (slime_molds and water_molds) protists.

The Protozoa ("first animals") are the animal-like (heterotrophic, motile) Protists and are classified (in part) based upon their method of motility (such as cilia, pseudopods, and flagella). Representatives of this group are primarily unicellular or colonial.

These particular Protists (the Euglena) are flagellates and have a pellicle (a/k/a periplast), which is not a cell_wall, but rather a layer of elastic proteins that accumulate below the cell_membrane.

These organisms live in fresh water and have chloroplasts in addition to a flagella, so they are classified in various ways. They store their carbohydrate products as paramylon_bodies. The carbohydrate is produced in a structure called a pyrenoid, which is located inside its chloroplasts. Euglenoids reproduce by binary_fission.