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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.

Nerve and glial cells in fruit fly embryo

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Glial cells (stained green) in a fruit fly developing embryo have survived thanks to a signaling pathway initiated by neighboring nerve cells (stained red). Hermann Steller, Rockefeller University View Media

Cell-like compartments from frog eggs 2

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Cell-like compartments that spontaneously emerged from scrambled frog eggs, with nuclei (blue) from frog sperm. Endoplasmic reticulum (red) and microtubules (green) are also visible. Xianrui Cheng, Stanford University School of Medicine. View Media

Plasma membrane (with labels)

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The plasma membrane is a cell's protective barrier. See image 2523 for an unlabeled version of this illustration. Featured in The Chemistry of Health. Crabtree + Company View Media

Cryo-electron microscopy of the dengue virus showing protective membrane and membrane proteins

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Dengue virus is a mosquito-borne illness that infects millions of people in the tropics and subtropics each year. Like many viruses, dengue is enclosed by a protective membrane. Hong Zhou, UCLA View Media

G switch (with labels)

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The G switch allows our bodies to respond rapidly to hormones. G proteins act like relay batons to pass messages from circulating hormones into cells. Crabtree + Company View Media

Nucleolus subcompartments spontaneously self-assemble 1

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The nucleolus is a small but very important protein complex located in the cell's nucleus. Nilesh Vaidya, Princeton University 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

Hydra 01

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Hydra magnipapillata is an invertebrate animal used as a model organism to study developmental questions, for example the formation of the body axis. Hiroshi Shimizu, National Institute of Genetics in Mishima, Japan View Media

Stress Response in Cells

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Two highly stressed osteosarcoma cells are shown with a set of green droplet-like structures followed by a second set of magenta droplets. Julia F. Riley and Carlos A. Castañeda, Syracuse University View Media

Chromatin in human fibroblast

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The nucleus of a human fibroblast cell with chromatin—a substance made up of DNA and proteins—shown in various colors. Melike Lakadamyali, Perelman School of Medicine at the University of Pennsylvania. View Media

Cytoskeleton

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The three fibers of the cytoskeleton--microtubules in blue, intermediate filaments in red, and actin in green--play countless roles in the cell. Judith Stoffer View Media

Mouse Brain Cross Section

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The brain sections are treated with fluorescent antibodies specific to a particular protein and visualized using serial electron microscopy (SEM). Anton Maximov, The Scripps Research Institute, La Jolla, CA View Media

Fruit fly larvae brains showing tubulin

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Two fruit fly (Drosophila melanogaster) larvae brains with neurons expressing fluorescently tagged tubulin protein. Vladimir I. Gelfand, Feinberg School of Medicine, Northwestern University. View Media

Endothelial cell

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This image shows two components of the cytoskeleton, microtubules (green) and actin filaments (red), in an endothelial cell derived from a cow lung. Tina Weatherby Carvalho, University of Hawaii at Manoa View Media

Epithelial cell migration

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High-resolution time lapse of epithelial (skin) cell migration and wound healing. It shows an image taken every 13 seconds over the course of almost 14 minutes. Michael Shribak, Marine Biological Laboratory/University of Chicago. View Media

Cross section of a Drosophila melanogaster pupa

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This photograph shows a magnified view of a Drosophila melanogaster pupa in cross section. Compare this normal pupa to one that lacks an important receptor, shown in image 2759. Christina McPhee and Eric Baehrecke, University of Massachusetts Medical School View Media

Biofilm blocking fluid flow

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This time-lapse movie shows that bacterial communities called biofilms can create blockages that prevent fluid flow in devices such as stents and catheters over a period of about 56 hours. Bonnie Bassler, Princeton University View Media

Arabidopsis leaf injected with a pathogen

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This is a magnified view of an Arabidopsis thaliana leaf eight days after being infected with the pathogen Hyaloperonospora arabidopsidis, which is closely related to crop pathogens that Jeff Dangl, University of North Carolina, Chapel Hill View Media

Biopixels

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Bioengineers were able to coax bacteria to blink in unison on microfluidic chips. This image shows a small chip with about 500 blinking bacterial colonies or biopixels. Jeff Hasty Lab, UC San Diego View Media

Aging book of life

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Damage to each person's genome, often called the "Book of Life," accumulates with time. Judith Stoffer View Media

Dividing yeast cells with nuclear envelopes and spindle pole bodies

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Time-lapse video of yeast cells undergoing cell division. Nuclear envelopes are shown in green, and spindle pole bodies, which help pull apart copied genetic information, are shown in magenta. Alaina Willet, Kathy Gould’s lab, Vanderbilt University. 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

Mitochondria from rat heart muscle cell_2

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These mitochondria (brown) are from the heart muscle cell of a rat. Mitochondria have an inner membrane that folds in many places (and that appears here as striations). National Center for Microscopy and Imaging Research View Media

Misfolded proteins in mitochondria, 3-D video

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Three-dimensional image of misfolded proteins (green) within mitochondria (red). Related to image 5878. Rong Li, Department of Chemical and Biomolecular Engineering, Whiting School of Engineering, Johns Hopkins University View Media

Mitosis - prometaphase

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A cell in prometaphase during mitosis: The nuclear membrane breaks apart, and the spindle starts to interact with the chromosomes. Judith Stoffer View Media

Lysosomes

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Lysosomes have powerful enzymes and acids to digest and recycle cell materials. Judith Stoffer View Media

Yeast cells with endocytic actin patches

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Yeast cells with endocytic actin patches (green). These patches help cells take in outside material. When a cell is in interphase, patches concentrate at its ends. Alaina Willet, Kathy Gould’s lab, Vanderbilt University. View Media

Cells keep their shape with actin filaments and microtubules

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This image shows a normal fibroblast, a type of cell that is common in connective tissue and frequently studied in research labs. James J. Faust and David G. Capco, Arizona State University View Media

Breast cancer cells change migration phenotypes

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Cancer cells can change their migration phenotype, which includes their shape and the way that they move to invade different tissues. Bo Sun, Oregon State University. View Media

A panorama view of cells

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This photograph shows a panoramic view of HeLa cells, a cell line many researchers use to study a large variety of important research questions. Tom Deerinck, National Center for Microscopy and Imaging Research View Media

Focal adhesions

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Cells walk along body surfaces via tiny "feet," called focal adhesions, that connect with the extracellular matrix. Crabtree + Company View Media

Weblike sheath covering developing egg chambers in a giant grasshopper

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The lubber grasshopper, found throughout the southern United States, is frequently used in biology classes to teach students about the respiratory system of insects. Kevin Edwards, Johny Shajahan, and Doug Whitman, Illinois State University. View Media

Zebrafish embryo showing vasculature

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A zebrafish embryo. The blue areas are cell bodies, the green lines are blood vessels, and the red glow is blood. Kevin Eliceiri, University of Wisconsin-Madison. View Media

How cilia do the wave

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Thin, hair-like biological structures called cilia are tiny but mighty. Zvonimir Dogic, Brandeis University View Media

Cell-like compartments emerging from scrambled frog eggs 2

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Cell-like compartments spontaneously emerge from scrambled frog eggs, with nuclei (blue) from frog sperm. Endoplasmic reticulum (red) and microtubules (green) are also visible. Xianrui Cheng, Stanford University School of Medicine. 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

Scanning electron microscopy of collagen fibers

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This image shows collagen, a fibrous protein that's the main component of the extracellular matrix (ECM). Collagen is a strong, ropelike molecule that forms stretch-resistant fibers. Tom Deerinck, National Center for Microscopy and Imaging Research (NCMIR) View Media

Mapping brain differences

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This image of the human brain uses colors and shapes to show neurological differences between two people. Arthur Toga, University of California, Los Angeles View Media

Misfolded proteins within in the mitochondria

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Misfolded proteins (green) within mitochondria (red). Related to video 5877. Rong Li rong@jhu.edu Department of Chemical and Biomolecular Engineering, Whiting School of Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA. View Media

Mouse Retina

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A genetic disorder of the nervous system, neurofibromatosis causes tumors to form on nerves throughout the body, including a type of tumor called an optic nerve glioma that can result in childhood bli Tom Deerinck, NCMIR View Media

Pathways: What is Basic Science?

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Learn about basic science, sometimes called “pure” or “fundamental” science, and how it contributes to the development of medical treatments. National Institute of General Medical Sciences View Media

Mitotic cell awaits chromosome alignment

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During mitosis, spindle microtubules (red) attach to chromosome pairs (blue), directing them to the spindle equator. View Media

Bone cancer cell

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This image shows an osteosarcoma cell with DNA in blue, energy factories (mitochondria) in yellow, and actin filaments—part of the cellular skeleton—in purple. Dylan Burnette and Jennifer Lippincott-Schwartz, NICHD View Media

Floral pattern in a mixture of two bacterial species, Acinetobacter baylyi and Escherichia coli, grown on a semi-solid agar for 48 hours (photo 2)

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Floral pattern emerging as two bacterial species, motile Acinetobacter baylyi (red) and non-motile Escherichia coli (green), are grown together for 48 hours on 1% agar surface from a sma L. Xiong et al, eLife 2020;9: e48885 View Media

Mitosis and meiosis compared

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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

Stretch detectors

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Muscles stretch and contract when we walk, and skin splits open and knits back together when we get a paper cut. Christopher Chen, University of Pennsylvania View Media

Glowing fish

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Professor Marc Zimmer's family pets, including these fish, glow in the dark in response to blue light. Featured in the September 2009 issue of Findings. View Media

Dividing yeast cells with spindle pole bodies and contractile rings

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During cell division, spindle pole bodies (glowing dots) move toward the ends of yeast cells to separate copied genetic information. Alaina Willet, Kathy Gould’s lab, Vanderbilt University. View Media

Hippocampal neuron from rodent brain

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Hippocampal neuron from rodent brain with dendrites shown in blue. The hundreds of tiny magenta, green and white dots are the dendritic spines of excitatory synapses. Shelley Halpain, UC San Diego View Media

Red blood cells

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This image of human red blood cells was obtained with the help of a scanning electron microscope, an instrument that uses a finely focused electron beam to yield detailed images of the surface of a sa Tina Weatherby Carvalho, University of Hawaii at Manoa View Media