Cells and Viruses

Microscopic illustrations of human cells, viruses, and bacteria, highlighting scientific and medical themes with vibrant colors and detailed imagery.

Human sperm surrounding an unfertilized ovum prior to conception.
Human sperm surrounding an unfertilized ovum prior to conception.
246 assets in this story
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Hartmanella vermiformis. Color enhanced scanning electron micrograph of cysts of the protozoan Hartmanella vermiformis on a laboratory-grown potable water biofilm. Aquatic bacteria were grown as biofilm on steel for one week. Hartmanella vermiformis protozoans were then added, and phagocytized the bacteria that multiplied within vesicles that became cysts in which the bacteria will live until they rupture.
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Chlamydia bacteria in a cell. Computer illustration showing an inclusion composed of a group of chlamydia (violet) near the nucleus (red) of a cell.
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A cluster of CCL-81 cells infected with SARS-CoV-2 virus particles, which are the small spherical structures found on the surface of the cells. The protrusions extending from the cells are cell projections or pseudopodium. Image captured at the NIAID Integrated Research Facility (IRF) in Fort Detrick, Maryland.
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White blood cells, SEM
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Blood cells. Coloured scanning electron micrograph SEM of red blood cells pink and an aggregate of platelets red. Magnification: x4000 when printed at...
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Mesenchymal stem cell, SEM
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Nerves The cells transmit signals
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Blood vessel with blood cells, computer illustration. Red blood cells and white blood cells inside a blood vessel.
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Athlete's foot fungus, illustration
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Scanning electron micrograph of an apoptotic HeLa cell. Zeiss Merlin HR-SEM.
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Computer illustration of a blood clot inside a vein, known as a venous thrombus.
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Cancer cell and T cell, illustration
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Colorized scanning electron micrograph of monkeypox virus (green) on the surface of infected VERO E6 cells (red).
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Cancer cells, illustration
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Illustration of a cancer cell
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Group of chlamydia bacteria.
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Colorized scanning electron micrograph of Marburg virus particles (blue) both budding and attached to the surface of an infected VERO E6 cell (gold).
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Colorized scanning electron micrograph of Middle East Respiratory Syndrome virus particles (yellow) attached to the surface of an infected VERO E6 cell (blue). Image captured and color-enhanced at the NIAID Integrated Research Facility in Fort Detrick, Maryland. Credit: NIAID.
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Genetic engineering, illustration. Synthetic small-ribonucleic acid (sRNA) being injected (needle tip at upper right) into the cell cytoplasm as part ...
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Bacteriophages infecting E. coli bacterium, illustration
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Seminiferous tubules in the testis, SEM
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Harebell (Campanula rotundifolia) pollen grain, false-coloured Scanning Electron Micrograph. Pollen grain 0.025mm across, image x4000 magnification when printed at 10cm wide.
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T lymphocytes (pre-T cells) and granulocyte (neutrophil), coloured scanning electron micrograph (SEM). Lymphocytes are involved in the specific immune...
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Chlamydia trachomatis bacteria, illustration
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Scanning Electron Micrograph (SEM): Coccolithophore (Calcareous Nannoplankton), Gephyrocapsa ericsonii. Date:
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Red blood cells and activated platelets or thrombocytes. 3D illustration. Red blood cells and activated platelets or thrombocytes
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Cancer cells, computer artwork. The uneven surface and cytoplasmic projections are characteristic of cancer cells.
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Illustration of a cancer cell
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Globigerina foraminiferan. Coloured scanning electron micrograph (SEM) of the shell (test) of a Globigerina sp. planktonic foraminiferan. Foraminifera...
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A scanning electron microsope's view of blood cells. The round non-nucleated doughnut shaped cells are red blood cells, which transport oxygen and remove carbon dioxide. The spherical cells with a rough texture are white blood cells, which produce antibodies and fight infection. The smallest peices are platelets, tiny cells needed for blood clotting. Photo by Bruce Wetzel and Harry Schaefer.
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Kidney glomerulus, SEM
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Cancer cells, illustration
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Globigerina foraminiferan. Coloured scanning electron micrograph (SEM) of the shell (test) of a Globigerina sp. planktonic foraminiferan. Foraminifera...
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Thalli of the calcareous corraligenous alga Pseudolithophyllum
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Bay tree anther, SEM
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Illustration of a cancer cell
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Human embryo destruction, illustration
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Human lymph node, computer artwork.
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Lyme disease tick, illustration
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Illustration of a cancer cell being attacked by white blood
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Medical comparison of healthy alveoli and an unhealthy emphysema alveoli.