I 



General Morphology 

 of the Protozoa 



Variations in form of the body 



Colonial organization 



Non-colonial groupings 



Cortex, secreted coverings and skeletons 



Pseiidopodia 



Flagella and associated structures 

 Flagella 

 Axostyles 



Costa, cresta, pelta and aciculum 

 The parabasal apparatus 

 Multiple karyomastigonts and mastigonts 



Cilia and their derivatives 



Fibrillar systems 



Neuromotor apparatus 

 Silver-line system 

 Neuroneme system 

 Infraciliary network 

 The infraciliature 

 Sensory bristles 



Significance of fibrillar systems 

 Silver-line systems of flagellates 



Myonemes and contractile stalks 



Trichocysts and nematocysts 



The cytostome and associated structmes 



\'acuoles of Protozoa 

 Contractile vacuoles 

 Sensory vacuoles 

 Vacuoles in flotation 



Chromatophores, pigments, pyrenoids, 

 photoreceptors 

 Chromatophores 

 Pyrenoids 

 Pigments 

 Photoreceptors 



Cytoplasmic inclusioirs 

 Cytoplasmic food reserves 

 Chromidia 

 Mitochondria 

 \'acuome 

 Osmiophilic inclusions and organelles 



Nuclei of Protozoa 

 Vesicular nuclei 

 Nuclear dimorphism 

 Dispersed nuclei 



Literature cited 



T. 



HE Protozoa include a variety of microorganisms which, by 

 general agreement of protozoologists, are currently assigned to the phy- 

 lum. More specific characterization of the Protozoa is difficult and even 

 the name of the phylum, as applied to the groups it conventionally in- 

 cludes, is not entirely appropriate. Many flagellates — those usually listed 

 as Phytomastigoda, Phytomastigina, or Phytomastigophora — are com- 

 monly considered algae by botanists. Also, the Mycetozoida (Mycetozoa) 



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