Protozoa Collection (#7)

Plankton cell wall, SEM
Plankton cell wall. Coloured scanning electron micrograph (SEM) of the geometrical plates making up the mineralised cell wall of a planktonic alga (Coronosphaera mediterranea)

Spirochona protozoa

Euglena protozoan, SEM
Euglena protozoan (Euglena sp.), coloured scanning electron micrograph (SEM). This protozoan is described as flagellate because it has a flagellum (thin tail-like structure)

LM of assorted fossil Foraminifera shells
Foraminiferan shells. Light micrograph of assorted shells of fossil species belonging to the order: Foraminifera. Single-celled protozoans once inhabited these shells which are composed of several

Protozoan, SEM
Protozoan. Coloured scanning electron micrograph (SEM) of a protozoan. Protozoa are unicellular eukaryotic organisms, that usually are not photosynthetic

Ciliate protozoans, SEM
Ciliate protozoans. Coloured scanning electron micrograph (SEM) of sessile (anchored) ciliate protozoan (subclass Peritrichia)

Giardia protozoan, TEM
Giardia protozoan. Coloured transmission electron micrograph (TEM) of a Giardia sp. protozoan. It is a single-celled organism that has two cell nuclei (green)

Calcareous phytoplankton plates, SEM
Calcareous phytoplankton plates. Coloured scanning electron micrograph (SEM) of parts of the skeleton (coccosphere) of the coccolithophore Emiliania huxleyi, a small marine algal organism

Trichomytopsis protozoan

Coloured SEM of Giardia lamblia in human intestine
Giardia lamblia. Coloured Scanning Electron Micro- graph (SEM) of the parasite Giardia lamblia in the human small intestine

Ciliate protozoa, SEM
Ciliate protozoa. Coloured scanning electron micrograph (SEM) of cilliate protozoa (unicellular animals). The ciliates are so named because of the hair-like cilia surrounding their bodies which are

LM of a colony of Volvox
Light micrograph of a colony of Volvox containing eight asexual daughter colonies within. Volvox is an organism that lies between the plant & animal kingdom

Naegleria fowleri protozoa, TEM
Naegleria fowleri protozoan. Coloured transmission electron micrograph (TEM) of a section through a Naegleria fowleri protozoan

Flagellate protozoan, SEM
Flagellate protozoan, coloured scanning electron micrograph (SEM). This is a protozoan that has a flagellum (thin tail-like structure, lower left)

Parasitic protozoan, TEM
Parasitic protozoan. Coloured transmission electron micrograph (TEM) of a trypanosome protozoan (Trypanosoma sp.). The nucleus (centre), cell membrane (outline)

Enterocytozoon sp. parasites, TEM

Isospora sp. parasites, TEM
Isospora sp. parasites. Coloured transmission electron micrograph (TEM) of Isospora sp. parasites (yellow) in a sectioned cell

Lychnocanium radiolarian, SEM
Lychnocanium radiolarian. Coloured scanning electron micrograph (SEM) of the shell of a Lychnocanium sp. radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton

TEM of Leishmania sp
False-colour transmission electron micrograph (TEM) of Leishmania sp. a parasitic flagellate protozoan that causes the disease leishmaniasis in humans

Naegleria fowleri protozoan, TEM
Naegleria fowleri protozoan. Coloured transmission electron micrograph (TEM) of a section through a Naegleria fowleri protozoan

Paramecium protozoa, SEM
Paramecium protozoa (Paramecium sp.), coloured scanning electron micrograph (SEM). These protozoa (two seen) are described as ciliate because many cilia (hair-like structures) cover them

Hartmannella amoeba and bacterium. Computer artwork of a Hartmannella vermiformis amoeba (green) engulfing a Legionella pneumophila bacterium (orange) with a pseudopodium

Protozoan cilia, SEM
Protozoan cilia. Coloured scanning electron micrograph (SEM) of cilia (microscopic hairs) from a ciliate protozoan. Ciliate protozoans are single-celled aquatic organisms

LM of Paramecium bursaris
Light micrograph of Paramecium bursaris, a member of the species of green paramecia. The green colouration is due to the presence of unicellulate green algae which form organic substances & produce

Amphisphaerina radiolarian, SEM
Amphisphaerina radiolarian. Coloured scanning electron micrograph (SEM) of the shell of a Amphisphaerina sp. radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton

Acrosphaera radiolarian, SEM
Acrosphaera radiolarian. Coloured scanning electron micrograph (SEM) of the shell of a Acrosphaera sp. radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton

Dendrocometes protozoan. Coloured scanning electron micrograph (SEM) of a Dendrocometes paradoxus protozoan (single-celled animal)

Green algae colonies. Light micrograph of green algae colonies (Volvox sp.). These colonies are made up of approximately 500 individual flagellate cells, arranged in a glycoprotein filled sphere

Amoeba, SEM
Amoeba. Coloured scanning electron micrograph (SEM) of an Amoeba proteus protozoan. This is a freshwater single-celled organism that feeds on bacteria and smaller protozoa

LM of assorted Foraminifera shells
Foraminiferan shells. Light micrograph of assorted species of shells belonging to the order Foramini- fera. Single-celled protozoans inhabit these shells which are composed of several chambers

Protozoan cilia, SEM
Protozoan cilia. Coloured scanning electron micrograph (SEM) of cilia (microscopic hairs) from a ciliate protozoan. Ciliate protozoans are single-celled aquatic organisms

Watercolour artwork of the protozoan, Euglena sp
Euglena sp. Watercolour artwork of the pond- dwelling Euglena sp. a protozoan. This single- celled organism has a tail-like flagellum for locomotion (at centre left)

F. colour SEM of oocysts on stomach of Anopheles
False-colour scanning electron micrograph of the stomach wall of a mosquito Anopholes stephansii infected with malarial parasites Plasmodium

Illustration of the protozoan, Giardia lamblia
Illustration of the parasite Giardia lamblia, a single-celled protozoan that causes the human intestinal disorder giardiasis (known also as lambliasis)

Human diseases. Artwork of a male silhouetted figure, surrounded by various disease-causing organisms. The mosquito (Anopheles gambiae, upper left) transmits a parasitic protozoan it bites

Diarrhoea, artwork
Diarrhoea. Artwork of the human large intestine surrounded by some of the microorganisms that can cause diarrhoea. Diarrhoea is the frequent passing of liquid stools as a symptom of inflammation

Malaria parasite, TEM
Malaria parasite. Image 4 of 10. Coloured transmission electron micrograph (TEM) of a sexual male malaria (Plasmodium sp.) microgametocyte in a mosquito (Anopheles sp.) gut

AIDS pneumonia infection, TEM
AIDS pneumonia infection. Coloured transmission electron micrograph (TEM) of a section through Pneumocystis carinii protozoa causing pneumonia. The protozoa are crescent-shaped (red/yellow)

Euglypha amoeba shell, SEM
Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba. Magnification: x1350 when printed at 10 centimetres wide

Frontonia protozoa, light micrograph
Frontonia protozoa. Light micrograph of a group of Frontonia sp. ciliate protozoa

Euglena flagellate protozoan, SEM
Euglena flagellate protozoan. Coloured scanning electron micrograph (SEM) of a Euglena sp. flagellate protozoan present in a urine sample taken from someone with a urinary tract infection (UTI)

Frontonia protozoan, light micrograph
Frontonia protozoan. Light micrograph of a Frontonia sp. ciliate protozoan

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

Stentor coeruleus protozoan, micrograph
Stentor coeruleus protozoan. Light micrograph of Stentor coeruleus amongst green algae. This large single-celled protist measures 0.5 to 2 millimetres when fully extended

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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.