19 2 Animallike Protists KEY CONCEPT Animallike protists

19. 2 Animal-like Protists KEY CONCEPT Animal-like protists are single-celled heterotrophs that can move.

19. 2 Animal-like Protists Animal-like protists move in various ways. • Animal-like protists are often called protozoa. macronucleus contractile vacuole food vacuole oral groove micronucleus cilia

19. 2 Animal-like Protists • Protozoa with flagella are zooflagellates. – flagella help zooflagellates swim – more than 2000 zooflagellates

19. 2 Animal-like Protists • Some protists move with pseudopods. – ��change shape as they move – Example: amoebas

19. 2 Animal-like Protists • Some protists move with pseudopods. – ��change shape as they move – amoebas – foraminifera

19. 2 Animal-like Protists • Some protozoa move with cilia. – cilia help protists swim and capture food – more than 8000 ciliates macronucleus contractile vacuole food vacuole oral groove micronucleus cilia

19. 2 Animal-like Protists Some animal-like protists cause disease. • Protists cause some wellknown infectious diseases. • Malaria is caused by Plasmodium and spread by mosquitoes. • Sleeping sickness is caused by Trypanosoma and spread by flies. • A giardia infection is caused by Giardia and spread through water. human liver sporozoites liver cells developed parasites red blood cells Malaria Infection