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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.

Hydra 05

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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

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

Bacteria in the mouse colon

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Image of the colon of a mouse mono-colonized with Bacteroides fragilis (red) residing within the crypt channel. The red staining is due to an antibody to B. Sarkis K. Mazmanian, California Institute of Technology View Media

Yeast cells with Fimbrin Fim1

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Yeast cells with the protein Fimbrin Fim1 shown in magenta. This protein plays a role in cell division. This image was captured using wide-field microscopy with deconvolution.
Alaina Willet, Kathy Gould’s lab, Vanderbilt University. View Media

Cryo-ET cross-section of a rat pancreas cell

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On the left, a cross-section slice of a rat pancreas cell captured using cryo-electron tomography (cryo-ET). On the right, a 3D, color-coded version of the image highlighting cell structures. Xianjun Zhang, University of Southern California. View Media

Lily mitosis 11

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A light microscope image of cells 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

Mitosis - prophase

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A cell in prophase, near the start of mitosis: In the nucleus, chromosomes condense and become visible. In the cytoplasm, the spindle forms. Judith Stoffer View Media

Spreading Cells 01

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Cells move forward with lamellipodia and filopodia supported by networks and bundles of actin filaments. Proper, controlled cell movement is a complex process. Rong Li and Praveen Suraneni, Stowers Institute for Medical Research View Media

Colony of human ES cells

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A colony of human embryonic stem cells (light blue) grows on fibroblasts (dark blue). California Institute for Regenerative Medicine View Media

Chromatin in human tenocyte

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The nucleus of a degenerating human tendon cell, also known as a tenocyte. It has been color-coded based on the density of chromatin—a substance made up of DNA and proteins. Melike Lakadamyali, Perelman School of Medicine at the University of Pennsylvania. View Media

Mosaicism in C. elegans (Black Background)

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In the worm C. elegans, double-stranded RNA made in neurons can silence matching genes in a variety of cell types through the transport of RNA between cells. Snusha Ravikumar, Ph.D., University of Maryland, College Park, and Antony M. Jose, Ph.D., University of Maryland, College Park View Media

Cell-like compartments from frog eggs 6

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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

Fruit fly brain responds to adipokines

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Drosophila adult brain showing that an adipokine (fat hormone) generates a response from neurons (aqua) and regulates insulin-producing neurons (red).
Akhila Rajan, Fred Hutchinson Cancer Center 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

Brains of sleep-deprived and well-rested fruit flies

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On top, the brain of a sleep-deprived fly glows orange because of Bruchpilot, a communication protein between brain cells. These bright orange brain areas are associated with learning. Chiara Cirelli, University of Wisconsin-Madison View Media

Hydra 06

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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

Crab larva eye

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Colorized scanning electron micrographs progressively zoom in on the eye of a crab larva. In the higher-resolution frames, bacteria are visible on the eye. Tina Weatherby Carvalho, University of Hawaii at Manoa View Media

Centrioles anchor cilia in planaria

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Centrioles (green) anchor cilia (red), which project on the surface of pharynx cells of the freshwater planarian Schmidtea mediterranea. Juliette Azimzadeh, University of California, San Francisco View Media

Cell proliferation in a quail embryo

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Image showing that the edge zone (top of image) of the quail embryo shows no proliferating cells (cyan), unlike the interior zone (bottom of image). Non-proliferating cell nuclei are labeled green. Andrés Garcia, Georgia Tech 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

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

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

H1N1 Influenza Virus

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CellPack image of the H1N1 influenza virus, with hemagglutinin and neuraminidase glycoproteins in green and red, respectively, on the outer envelope (white); matrix protein in gray, and ribonucleoprot Dr. Rommie Amaro, University of California, San Diego 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

Arachnoidiscus diatom

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An Arachnoidiscus diatom with a diameter of 190µm. Michael Shribak, Marine Biological Laboratory/University of Chicago. View Media

Mouse embryo showing Smad4 protein

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This eerily glowing blob isn't an alien or a creature from the deep sea--it's a mouse embryo just eight and a half days old. The green shell and core show a protein called Smad4. Kenneth Zaret, Fox Chase Cancer Center View Media

Fruit fly ovaries

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Fruit fly (Drosophila melanogaster) ovaries with DNA shown in magenta and actin filaments shown in light blue. This image was captured using a confocal laser scanning microscope.
Vladimir I. Gelfand, Feinberg School of Medicine, Northwestern University. View Media

Body toxins (with labels)

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Body organs such as the liver and kidneys process chemicals and toxins. These "target" organs are susceptible to damage caused by these substances. Crabtree + Company 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

HeLa cells

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Scanning electron micrograph of just-divided HeLa cells. Zeiss Merlin HR-SEM. National Center for Microscopy and Imaging Research View Media

Mitosis - telophase

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Telophase during mitosis: Nuclear membranes form around each of the two sets of chromosomes, the chromosomes begin to spread out, and the spindle begins to break down. Judith Stoffer View Media

Fibroblasts with nuclei in blue, energy factories in green and the actin cytoskeleton in red

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The cells shown here are fibroblasts, one of the most common cells in mammalian connective tissue. These particular cells were taken from a mouse embryo. Dylan Burnette, NICHD View Media

Fly cells

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If a picture is worth a thousand words, what's a movie worth? Denise Montell, Johns Hopkins University School of Medicine View Media

Egg cell

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Sketch of an egg cell. Judith Stoffer View Media

Molecules blocking Huntington's protein production

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The molecules that glow blue in these cultured cells prevent the expression of the mutant proteins that cause Huntington's disease. Jiaxin Hu, David W. Dodd and Robert H. E. Hudson, UT Southwestern Medical Center 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