1 PHYLUM MYXOZOA AND PHYLUM SARCOMASTIGOPHORA

PHYLUM MYXOZOA

consists of microscopic parasitic organisms primarily found in aquatic animals, especially fish.

Obligate parasites

all myxozoans are

single-celled organism

many myxozoans are

intermediate/secondary host

mostly fish

defimitive/primary host

worms/bryozoans

cell-in-cell state

development inside the mother cells

gut epithelium

attachment to __________ of primary host

multicellular

Myxozoans are ____________ but microscopic parasites. They have a spore stage with complex, durable capsules.

polar capsules (resembling nematocysts) and infectious sporoplasm

Characterized by two main structures: (myxozoans)

Simple organization, mainly suited for a parasitic lifestyle. No digestive, circulatory, or nervous systems

physiology of myxozoans

Thick-walled spores

Protection of myxozoans

rely on spore durability

Defense Mechanism of myxozoans

polar capsule

Survival Structures of myxozoans
helps anchor the parasite to the host tissue.

nutrients directly from tissues of the fish they infect

What do myxozoans eat?

asexually (binary fission) and sexually (within the host)

Mating practices of myxozoans

Phylum Sarcomastigophora

a diverse group of single-celled eukaryotic organisms, primarily characterized by their locomotion through flagella.

unicellular organisms. divided into amoebas (sarcodina) and flagellates (mastigophora)

Form of Phylum sarcomastigophora

sarcodina = pseudopodia
mastigophora = flagella

Structure of sarcomastigophora

simple body structures, for locomotion

Physiology of Sarcomastigophora

protective cyst stages

Protection of Sarcomastigophora

evade host immune responses

defense mechanism of Sarcomastigophora

sarcodina - extending their cytoplasm
mastigophora - use whip-like flagella

movement of Sarcomastigophora

chemical signaling

communication of Sarcomastigophora

rely on diffusion through their cell membranes

circulation and gas exchange of Sarcomastigophora

heterotrophic, consuming bacteria

nutrition and digestion of Sarcomastigophora

asexual (binary fission) some sexual

mating practices of Sarcomastigophora