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This is a searchable collection of scientific photos, illustrations, and videos. The images and videos in this gallery are licensed under Creative Commons Attribution Non-Commercial ShareAlike 3.0. This license lets you remix, tweak, and build upon this work non-commercially, as long as you credit and license your new creations under identical terms.

Skin cell (keratinocyte)

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This normal human skin cell was treated with a growth factor that triggered the formation of specialized protein structures that enable the cell to move. Torsten Wittmann, University of California, San Francisco View Media

Cross section of a Drosophila melanogaster pupa lacking Draper

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In the absence of the engulfment receptor Draper, salivary gland cells (light blue) persist in the thorax of a developing Drosophila melanogaster pupa. Christina McPhee and Eric Baehrecke, University of Massachusetts Medical School View Media

Lysosome clusters around amyloid plaques

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It's probably most people's least favorite activity, but we still need to do it--take out our trash. Otherwise our homes will get cluttered and smelly, and eventually, we'll get sick. Swetha Gowrishankar and Shawn Ferguson, Yale School of Medicine View Media

Plasma membrane

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The plasma membrane is a cell's protective barrier. See image 2524 for a labeled version of this illustration. Featured in The Chemistry of Health. Crabtree + Company View Media

An insect tracheal cell delivers air to muscles

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Insects like the fruit fly use an elaborate network of branching tubes called trachea (green) to transport oxygen throughout their bodies. Jayan Nair and Maria Leptin, European Molecular Biology Laboratory, Heidelberg, Germany View Media

Host infection stimulates antibiotic resistance

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This illustration shows pathogenic bacteria behave like a Trojan horse: switching from antibiotic susceptibility to resistance during infection. View Media

Lily mitosis 12

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A light microscope image of a cell from the endosperm of an African globe lily (Scadoxus katherinae). This is one frame of a time-lapse sequence that shows cell division in action. Andrew S. Bajer, University of Oregon, Eugene View Media

Dividing cell

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As this cell was undergoing cell division, it was imaged with two microscopy techniques: differential interference contrast (DIC) and confocal. The DIC view appears in blue and shows the entire cell. Dylan T. Burnette, Vanderbilt University School of Medicine. View Media

Developing nerve cells

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These developing mouse nerve cells have a nucleus (yellow) surrounded by a cell body, with long extensions called axons and thin branching structures called dendrites. Torsten Wittmann, University of California, San Francisco View Media

Tongue 1

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Microscopy image of tongue. One in a series of two, see image 5811 National Center for Microscopy and Imaging Research (NCMIR) View Media

Biosensors illustration

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A rendering of an activity biosensor image overlaid with a cell-centered frame of reference used for image analysis of signal transduction. Gaudenz Danuser, Harvard Medical School View Media

Neural development

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Using techniques that took 4 years to design, a team of developmental biologists showed that certain proteins can direct the subdivision of fruit fly and chicken nervous system tissue into the regions Mieko Mizutani and Ethan Bier, University of California, San Diego, and Henk Roelink, University of Washington View Media

Nucleolus subcompartments spontaneously self-assemble 4

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What looks a little like distant planets with some mysterious surface features are actually assemblies of proteins normally found in the cell's nucleolus, a small but very important protein complex lo Nilesh Vaidya, Princeton University View Media

Mitosis and meiosis compared-labeled

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Meiosis is used to make sperm and egg cells. During meiosis, a cell's chromosomes are copied once, but the cell divides twice. Judith Stoffer View Media

Nucleosome

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Like a strand of white pearls, DNA wraps around an assembly of special proteins called histones (colored) to form the nucleosome, a structure responsible for regulating genes and condensing DNA strand Karolin Luger, Colorado State University View Media

Seeing signaling protein activation in cells 02

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Cdc42, a member of the Rho family of small guanosine triphosphatase (GTPase) proteins, regulates multiple cell functions, including motility, proliferation, apoptosis, and cell morphology. Klaus Hahn, University of North Carolina, Chapel Hill Medical School View Media

Protein map

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Network diagram showing a map of protein-protein interactions in a yeast (Saccharomyces cerevisiae) cell. This cluster includes 78 percent of the proteins in the yeast proteome. Hawoong Jeong, KAIST, Korea View Media

Small blood vessels in a mouse retina

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Blood vessels at the back of the eye (retina) are used to diagnose glaucoma and diabetic eye disease. They also display characteristic changes in people with high blood pressure. National Center for Microscopy and Imaging Research View Media

Fruit fly retina 02

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Section of a fruit fly retina showing the light-sensing molecules rhodopsin-5 (blue) and rhodopsin-6 (red). Hermann Steller, Rockefeller University View Media

Purkinje cells are one of the main cell types in the brain

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This image captures Purkinje cells (red), one of the main types of nerve cell found in the brain. Yinghua Ma and Timothy Vartanian, Cornell University, Ithaca, N.Y. View Media

Molecular model of freshly made Rous sarcoma virus (RSV)

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Viruses have been the foes of animals and other organisms for time immemorial. Boon Chong Goh, University of Illinois at Urbana-Champaign View Media

Fruit fly nurse cells during egg development

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In many animals, the egg cell develops alongside sister cells. Adam C. Martin, Massachusetts Institute of Technology. View Media

Mitosis - anaphase

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A cell in anaphase during mitosis: Chromosomes separate into two genetically identical groups and move to opposite ends of the spindle. Judith Stoffer View Media

Nucleolus subcompartments spontaneously self-assemble 3

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What looks a little like distant planets with some mysterious surface features are actually assemblies of proteins normally found in the cell's nucleolus, a small but very important protein complex lo Nilesh Vaidya, Princeton University View Media

Microsporidia in roundworm 3

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Many disease-causing microbes manipulate their host’s metabolism and cells for their own ends. Keir Balla and Emily Troemel, University of California San Diego View Media

See how immune cell acid destroys bacterial proteins

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This animation shows the effect of exposure to hypochlorous acid, which is found in certain types of immune cells, on bacterial proteins. American Chemistry Council View Media

Synapses in culture

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Cultured hippocampal neurons grown on a substrate of glial cells (astrocytes). The glial cells form the pink/brown underlayment in this image. The tan threads are the neurons. National Center for Microscopy and Imaging Research View Media

Precisely Delivering Chemical Cargo to Cells

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Moving protein or other molecules to specific cells to treat or examine them has been a major biological challenge. Nature Nanotechnology View Media

Multivesicular bodies containing intralumenal vesicles assemble at the vacuole 3

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Collecting and transporting cellular waste and sorting it into recylable and nonrecylable pieces is a complex business in the cell. Matthew West and Greg Odorizzi, University of Colorado View Media

Biofilm formed by a pathogen

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A biofilm is a highly organized community of microorganisms that develops naturally on certain surfaces. Scott Chimileski, Ph.D., and Roberto Kolter, Ph.D., Harvard Medical School. View Media

Calling Cards in a mouse brain

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The green spots in this mouse brain are cells labeled with Calling Cards, a technology that records molecular events in brain cells as they mature. Allen Yen, Lab of Joseph Dougherty, Washington University School of Medicine in St. Louis. View Media

HIV, the AIDS virus, infecting a human cell

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This human T cell (blue) is under attack by HIV (yellow), the virus that causes AIDS. Seth Pincus, Elizabeth Fischer, and Austin Athman, National Institute of Allergy and Infectious Diseases, National Institutes of Health View Media

Planarian stem cell colony

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Planarians are freshwater flatworms that have powerful abilities to regenerate their bodies, which would seem to make them natural model organisms in which to study stem cells. Peter Reddien, Whitehead Institute View Media

Microsporidia in roundworm 2

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Many disease-causing microbes manipulate their host’s metabolism and cells for their own ends. Keir Balla and Emily Troemel, University of California San Diego View Media

Induced pluripotent stem cells from skin

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These induced pluripotent stem cells (iPS cells) were derived from a woman's skin. Green and red indicate proteins found in reprogrammed cells but not in skin cells (TRA1-62 and NANOG). Kathrin Plath lab, University of California, Los Angeles, via CIRM View Media

Fruit fly egg chamber

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A fruit fly (Drosophila melanogaster) egg chamber with microtubules shown in green and actin filaments shown in red. Vladimir I. Gelfand, Feinberg School of Medicine, Northwestern University. View Media

Quartered torso

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Cells function within organs and tissues, such as the lungs, heart, intestines, and kidney. Judith Stoffer View Media