Welcome to the Exciting World of Protists… Animal-like Protists Plant-like Protists Fungus-like Protists

SC Science Standard(s) Addressed: Standard 7-2: Standard 7-2: The student will demonstrate an understanding of the structure and function of cells, cellular reproduction, and heredity. Indicator Addressed Indicator Addressed Compare the body shapes of bacteria and the body structures that protists (euglena, paramecium, amoeba) use for food gathering and locomotion.

Protist Diversity 200,000 species come in different shapes, sizes, and colors 200,000 species come in different shapes, sizes, and colors All are eukaryotes – have a nucleus and membrane-bound organelles All are eukaryotes – have a nucleus and membrane-bound organelles

Protozoans Animal-like Protists

Protozoans Unicellular – made up of one cell Unicellular – made up of one cell Heterotrophs – they eat other organisms or dead organic matter Heterotrophs – they eat other organisms or dead organic matter Classified by how they move Classified by how they move

Phyla of Protozoans AmoebasFlagellatesCiliatesSporazoans

Amoebas: the blobs No cell wall No cell wall Move using pseudopods – plasma extensions Move using pseudopods – plasma extensions Engulf bits of food by flowing around and over them Engulf bits of food by flowing around and over them

Flagellates: the motorboats Use a whip-like extension called a flagella to move Use a whip-like extension called a flagella to move Some cause dis eases Some cause dis eases Water-borne diarrhea  Giardia Water-borne diarrhea  Giardia African Sleeping Sickness  Trypanasoma (Vector: Tsetse Fly) African Sleeping Sickness  Trypanasoma (Vector: Tsetse Fly)

Our Example: Euglena

Ciliates: the hairy ones Tiny hairs called cilia are used for locomotion and feeding Tiny hairs called cilia are used for locomotion and feeding Cilia beats in a synchronized pattern to cause movement Cilia beats in a synchronized pattern to cause movement

Our Example: Paramecium

As an Aside…

Sporazoans: the parasite Non-motile - Do not move Non-motile - Do not move Live inside a host Live inside a host One type causes malaria One type causes malaria Plasmodium Plasmodium

Malaria in red blood cells

The End The End