Protozoa Collection (#4)

Protozoan sexual reproduction, SEM Z105 / 0240
Protozoan sexual reproduction. Coloured scanning electron micrograph (SEM) of two Paramecium caudatum protozoa reproducing sexually by a method called conjugation

Coloured SEM of foraminiferan, Elphidium sp
Foraminiferan shell. Coloured scanning electron micrograph (SEM) of the test (shell) of the British formaminiferan, Elphidium crispum

Coloured SEM of Foraminifera Textularia sp. fossil
Fossil foraminifera. Coloured scanning electron micrograph (SEM) of the fossil shell of the single-celled protozoan Textularia sp. belonging to the order Foraminifera

Paramecium protozoa, SEM Z105 / 0239
Paramecium protozoa. Coloured scanning electron micrograph (SEM) of two Paramecium caudatum protozoa on filaments (green) of Oscillatoria sp. blue-green algae. P

Calcareous phytoplankton fossil, SEM Z100 / 0212
Calcareous phytoplankton fossil. Coloured scanning electron micrograph (SEM) of a fossil of the skeleton (coccosphere) of a coccolithotrope, a small marine algal organism

Chilodonella ciliate protozoa, LM
Chilodonella protozoa. Light micrograph of several Chilodonella sp. ciliate protozoa. Chilodonella is a single-celled animal that is found in freshwater

Fossilised foraminiferans, SEM
Fossilised foraminiferans. Coloured scanning electron micrograph (SEM) of the fossilised shells of assorted foraminiferan protozoa (order Foraminifera)

Coloured SEM of foraminiferan, Spirolina sp
Foraminiferan shell. Coloured scanning electron micrograph (SEM) of the test (shell) of the Mediterranean foraminiferan, Spirolina areitinus

Foraminiferan tests (shells), macrophotograph. Species seen here include Bulimina gibba, Elphidium crispum, E. articulatum, Lagena sulcata, and Miliolinella circularis

Foraminiferan fossil, SEM Z110 / 0239
Foraminiferan fossil. Coloured scanning electron micrograph (SEM) of the fossilised shell (test) of a foraminiferan. Foraminifera are single-celled marine protozoa that construct

Holosticha ciliate protozoan, SEM
Holosticha ciliate protozoan. Coloured scanning electron micrograph (SEM) of a Holosticha sp. ciliate protozoan ingesting diatoms (blue). Holosticha is a tiny single-celled aquatic organism

Euplotes protozoa, SEM C016 / 9040
Euplotes protozoa. Coloured scanning electron micrograph (SEM) showing the upperside (bottom) and underside (top) of two Euplotes sp. hypotrich ciliate protozoa

Climacostomum protozoan, SEM C016 / 9063
Climacostomum protozoan. Coloured scanning electron micrograph (SEM) of a Climacostomum sp. unicellular ciliate protozoan, showing the cells large oral apparatus (round, centre)

Euglena flagellate protozoa, SEM C016 / 9103
Euglena flagellate protozoa. Coloured scanning electron micrograph (SEM) of two Euglena sp. flagellate protozoa. Euglena sp

Climacostomum protozoan, SEM C016 / 9121
Climacostomum protozoan. Coloured scanning electron micrograph (SEM) of a Climacostomum sp. unicellular ciliate protozoan, showing the cells large oral apparatus (round, centre)

Climacostomum protozoan, SEM C016 / 9061
Climacostomum protozoan. Coloured scanning electron micrograph (SEM) of a Climacostomum sp. unicellular ciliate protozoan, showing the cells large oral apparatus (round, upper right)

Climacostomum protozoan, SEM C016 / 9120
Climacostomum protozoan. Coloured scanning electron micrograph (SEM) of a Climacostomum sp. unicellular ciliate protozoan, showing the cells large oral apparatus (round, centre)

Climacostomum protozoan, SEM C016 / 9065
Climacostomum protozoan. Coloured scanning electron micrograph (SEM) of a Climacostomum sp. unicellular ciliate protozoan, showing the cells large oral apparatus (round, upper right)

Euglena flagellate protozoa, SEM C016 / 9104
Euglena flagellate protozoa. Coloured scanning electron micrograph (SEM) of two Euglena sp. flagellate protozoa. Euglena sp

Climacostomum protozoan, SEM C016 / 9064
Climacostomum protozoan. Coloured scanning electron micrograph (SEM) of a Climacostomum sp. unicellular ciliate protozoan, showing the cells large oral apparatus (round, centre)

Climacostomum protozoan, SEM C016 / 9122
Climacostomum protozoan. Coloured scanning electron micrograph (SEM) of a Climacostomum sp. unicellular ciliate protozoan, showing the cells large oral apparatus (round, centre)

Hartmannella vermiformis protozoa cysts C016 / 9402
Hartmannella vermiformis protozoa cysts. Transmission electron micrograph (TEM) of a section through cysts (round) containing Hartmannella vermiformis protozoa. H

Legionella infected protozoan, TEM C016 / 9412
Legionella infected protozoan. Transmission electron micrograph (TEM) of a section through a single-celled Tetrahymena pyriformis protozoan, infected with Legionella pneumophila bacteria (yellow)

Heliozoan, SEM C016 / 9024
Heliozoan. Coloured scanning electron micrograph (SEM) of a heliozoan freshwater protozoan. This single-celled organism has many projections, known as axopods, radiating from its cell body

Euplotes protozoa, SEM C016 / 9041
Euplotes protozoa. Coloured scanning electron micrograph (SEM) showing the upperside (bottom) and underside (top) of two Euplotes sp. hypotrich ciliate protozoa

Climacostomum protozoan, SEM C016 / 9062
Climacostomum protozoan. Coloured scanning electron micrograph (SEM) of a Climacostomum sp. unicellular ciliate protozoan, showing the cells large oral apparatus (round, upper right)

Heliozoan, SEM C016 / 9023
Heliozoan. Coloured scanning electron micrograph (SEM) of a heliozoan freshwater protozoan. This single-celled organism has many projections, known as axopods, radiating from its cell body

Giardia protozoan, SEM C016 / 9398
Giardia protozoan. Coloured scanning electron micrograph (SEM) of a Giardia sp. trophozoite protozoan (yellow) attached to the lining of a human intestine

Ciliate protozoan ingesting algae. Darkfield illuminated light micrograph of a ciliate protozoan ingesting green algae (green)

Tetrahymena protozoan, SEM
Tetrahymena protozoan. Coloured scanning electron micrograph (SEM) of a Tetrahymena sp. ciliate protozoan. Tetrahymena are free-living freshwater unicellular organisms found in ponds

Amoeboid protozoa, SEM
Amoeboid protozoa. Differential interference contrast (DIC) micrograph of four Thecamoeba sp. amoebozoa. Amoebozoa are a major group of amoeboid protozoa, motile single-celled organisms

Ciliate protozoan, light micrograph
Ciliate protozoan. Darkfield illuminated light micrograph of a ciliate protozoan, showing green algae (green) that it has ingested

Sleeping sickness parasites, SEM
Sleeping sickness parasites. Coloured scanning electron micrograph (SEM) of a Trypanosoma brucei parasites (blue) and white blood cells (pink) in a mouse liver. T

Sleeping sickness parasite, SEM
Sleeping sickness parasite. Coloured scanning electron micrograph (SEM) of a Trypanosoma brucei parasite (blue) and a white blood cell (green) in a mouse liver. T

Fossil foraminifera necklace C016 / 5995
Fossil foraminifera (Alveolina sp.) necklace from Sindh, India. The fossils are from Eocene limestone. Necklace from John Whittakers cabinet. Natural History Museum, London, UK

Foraminiferan shell, SEM C018 / 0312
Foraminiferan shell, SEM

Paramecium sp. protozoa (SEM) C014 / 2148
Paramecium protozoa. Coloured scanning electron micrograph (SEM) of Paramecium sp. protozoa. These single-celled organisms are aquatic, being found in freshwater habitats

Radiolarian, SEM C014 / 4862
Radiolarian. Coloured scanning electron micrograph (SEM) of the shell or test of a radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton

Radiolarian, SEM C014 / 4863
Radiolarian. Coloured scanning electron micrograph (SEM) of the shell or test of a radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton

Radiolaria, light micrograph C014 / 4672
Radiolaria. Collection of light micrographs showing various different species of radiolaria. Radiolaria (or radiolarians) are amoeboid protozoa that produce intricate mineral skeletons

Ciliate protozoan, light micrograph C014 / 4676
Ciliate protozoan. Differential interference contrast micrograph of a ciliate protozoan, showing the symbiotic green algae (Zoochlorellae, green) contained in vacuoles within

Ciliate protozoan, light micrograph C014 / 4667
Ciliate protozoan. Differential interference contrast micrograph of a ciliate protozoan, showing the symbiotic green algae (Zoochlorellae, green) contained in vacuoles within

Foraminiferan, darkfield light micrograph. Foraminifera are marine single-celled protozoa that construct and inhabit shells composed of several chambers

Amoeba protozoa, light micrograph C016 / 8607
Amoeba protozoa. Interphase contrast light micrograph of two Amoeba sp. protozoa eating each other, showing its numerous pseudopodia (cytoplasmic extensions, leg-like)

Foraminifera, light micrograph C016 / 8597
Foraminifera. Interphase contrast light micrograph of a selection of different foraminifera. Foraminifera are marine single-celled protozoa that construct

Ciliate protozoan, light micrograph C016 / 8593
Ciliate protozoan. Differential interference contrast (DIC) light micrograph of a ciliate protozoan. Magnification: x280 when printed 10 centimetres wide

Hypotrich protozoan, light micrograph C016 / 8592
Hypotrich protozoan. Differential interference contrast (DIC) light micrograph of a Euplotes sp. hypotrich ciliate protozoan. Magnification: x280 when printed 10 centimetres wide

Hypotrich protozoan, light micrograph C016 / 8590
Hypotrich protozoan. Differential interference contrast (DIC) light micrograph of a Euplotes sp. hypotrich ciliate protozoan. Magnification: x280 when printed 10 centimetres wide

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Protozoa, the microscopic wonders of nature. From calcareous phytoplankton fossils to intricate artwork depicting Trypanosome protozoans, these single-celled organisms never cease to amaze. Take a closer look through the lens of SEM Z100 / 0213 and discover the mesmerizing beauty of their world. In one frame, we witness Plasmodium sp. , a malarial parasite that wreaks havoc on human health. Its complex structure reminds us of the delicate balance between life and disease. But not all it can harmful; many lead fascinating lives as scavengers or nutrient absorbers. Through light micrograph LM, we observe a kidney-shaped ciliate surrounded by Euglena sp. , showcasing their feeding habits at an astonishing magnification of x900. Diatoms, another group of protozoa, steal our attention with their intricate patterns and shapes. Acrosphaera radiolarian captivates us in its SEM image, displaying its ornate exoskeleton that protects it from predators. Foraminiferan tests (shells) take center stage in another SEM capture. These tiny structures tell stories about ancient oceans and provide valuable insights into Earth's history. Moving away from imagery, we encounter models representing foraminifera - miniature replicas that aid scientists in understanding these remarkable creatures' behavior and evolution. Not limited to aquatic environments alone, some protozoa find residence within our own bodies as intestinal parasites. TEM images reveal their presence while reminding us to prioritize hygiene and health practices. Amongst them is Trichomonas vaginalis captured through TEM - a reminder that even seemingly harmless organisms can cause discomfort if left unchecked. Lastly, Cryptosporidium protozoa appear under TEM's watchful eye – highlighting the importance of water safety measures due to this organism's ability to contaminate drinking sources with potential health risks. Protozoa may be small in size, but their impact on our world is immense.