Welcome to the Exciting World of Protists…

Welcome to the Exciting World of Protists…

Animal-like Protists

Plant-like Protists

Fungus-like Protists

SC ScienceStandard(s) Addressed:

Standard 7-2:

The student will demonstrate an understanding of the structure and function of cells, cellular reproduction, and heredity.

Indicator Addressed- 7-2.3

Compare the body shapes of bacteria and the body structures that protists (euglena, paramecium, amoeba) use for food gathering and locomotion.

Protist Diversity200,000 species come in different shapes, sizes, and colors

All are eukaryotes – have a nucleus and membrane-bound organelles

Protozoans

Animal-like Protists

ProtozoansUnicellular – made up of one cell

Heterotrophs – they eat other organisms or dead organic matter

Classified by how they move

Phyla of ProtozoansAmoebas

FlagellatesCiliates

Sporazoans

Amoebas: the blobs

No cell wallMove using pseudopods – plasma extensions

Engulf bits of food by flowing around and over them

Flagellates: the motorboats

Use a whip-like extension called a flagella to move

Some cause diseasesWater-borne diarrhea GiardiaAfrican Sleeping Sickness Trypanasoma (Vector: Tsetse Fly)

Our Example: Euglena

Ciliates: the hairy onesTiny hairs called cilia are used for locomotion and feeding

Cilia beats in a synchronized pattern to cause movement

Our Example: Paramecium

As an Aside…

Sporazoans: the parasite

Non-motile - Do not moveLive inside a hostOne type causes malaria

Plasmodium

Malaria in red blood cells

The End