Plant foods contain thousands of natural chemicals, which are called phytonutrients or phytochemicals("phyto" means "plant"). These chemicals help protect plants from germs, fungi, bugs, and other threats. Phytonutrients are not essential, but they may help prevent disease.
More than 25,000 phytochemicals are found in plant foods, and six important phytonutrients are:
Protists - members of an informal grouping of diverse eukaryotic organisms that are not animals, plants or fungi, and are grouped together for convenience, like algae or invertebrates. Besides their relatively simple levels of organization, protists do not necessarily have much in common.
Subdivisions of Protists
Protozoa the unicellular "animal-like" - Flagellata, Ciliophora, Amoeba, Sporozoans.
Protophyta the "plant-like" - mostly unicellular algae.
Molds the "fungus-like" - slime molds and water molds.