Kingdom Protista-PROTOZOAN

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Information about Kingdom Protista-PROTOZOAN

Published on February 6, 2014

Author: JeanieMartizano


Kingdom Protista PROTOZOAN S Animal-like Protists

General Characteristics • • • • Single-celled or unicellular organisms; Size = microscopic (3 to 1,000 microns). No germ layers, tissues, or organs; However, specialized intracellular "organelles" are present

General Characteristics • Locomotion by pseudopodia, flagella, or cilia. • Symmetry = all types (bilateral, radial, or asymmetrical) • Free living, commensal, parasitic, or mutualistic • Mostly naked, but few have simple protective exoskeletons (tests). Ex. = Arcella

Animal-like protists •All heterotrophs •classified by the structure used for movement: 1) Cilia - tiny beating hair-like structures •Coordinated movement between individual cilia 2) Flagellum(a) - whip-like tail(s) •Back and forth wave motion 4

Animal-like protists 3) Pseudopodia - projection of cytoplasm that sticks out like a foot (“false foot”) 4) Sessile - No locomotion (_________) movement 5

General Characteristics • Nutrition = heterotrophic, parasitic • Reproduction: asexual = longitudinal and transverse binary fission, budding, • Reproduction: sexual - conjugation

Phylum Sarcodina/Rhizopoda

Amoeba Pseudopod Food Vacuole Contractile Vacuole Nucleus Phagocytosis Hyaline Cap

Amoeba hunting food Figure 11.05

Left: live Amoeba proteus (100 x). Right: fixed, stained Amoeba with diatoms, nucleus (stained dark pink).

Arcella Side View Test Pseudopod

Arcella Top View Nucleus

Phylum Mastigophora/Zoomastigophora • Organisms are only heterotrophic • Parasitic/free-living Red Blood Cells Trypanosoma smear – cause of sleeping sickness Organism

Trypanasoma Trypanosoma organism Red Blood Cells

Phylum Ciliophora The Ciliates • • • • • Organisms move by cilia Usually two sizes of nuclei Macronucleus and micronucleus Reproduction usually by transverse binary fission but sexual reproduction by conjugation


Binary Fission – Asexual Reproduction

Conjugation – sexual reproduction



Phylum Sporozoa • organisms do not have locomotor structures; • all species are parasitic Plasmodium smear – cause of Malaria

Plasmodium – agent For malaria Vector Final Host

Ring stage trophozoite merozoite Red blood cell Trophozooite

Ring stage in red blood cell Ring stage – Early Trophozoite

Schizont with merozoites in red blood cell Red blood cell Merozoites in the Schizont

Female Male Gametocytes

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