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Antibodies binding to a virus (norovirus) Antibodies identify and neutralize pathogens search as viri. Stock Photo

#84158371 - Antibodies binding to a virus (norovirus) Antibodies identify..

Tapeworm in human intestine

#81111217 - Tapeworm in human intestine

Intestine affected by Morbus Crohn

#75540366 - Intestine affected by Morbus Crohn

T-cell receptor in complex with the MHC class II-peptide complex. The antigen (light green) is a peptide from a tumor cell, bacteria or virus.

#60596993 - T-cell receptor in complex with the MHC class II-peptide complex...

Dendritic cells and T-lymphocytes

#58987958 - Dendritic cells and T-lymphocytes

Interaction between a T-lymphocyte (left) and a dendritic cell. Stock Photo

#58987956 - Interaction between a T-lymphocyte (left) and a dendritic cell.

T-Lymphocytes attacking cancer cell.Natural killer cells are a type of lymphocytes which destroy cancer cells and other altered cells releasing cytotoxic granules. Stock Photo

#58218107 - T-Lymphocytes attacking cancer cell.Natural killer cells are..

Fat cells. White fat cells contain a large lipid droplet (yellow) and a nucleus (red) located in the periphery.

#56089315 - Fat cells. White fat cells contain a large lipid droplet (yellow)..

A bacterial colony, bacilli Bacteria are prokaryotic microorganisms with a diversity of shapes ranging from spheres to rods and spirals.

#56089310 - A bacterial colony, bacilli Bacteria are prokaryotic microorganisms..

Dividing stem cells (mitosis) Stem cells are undifferentiated cells that can specialized through mitosis to many other cell types of multicellular organisms.

#55937357 - Dividing stem cells (mitosis) Stem cells are undifferentiated..

The beta amyloid peptid aggregates to amyloid plaques, Alzheimer disease Stock Photo

#54393704 - The beta amyloid peptid aggregates to amyloid plaques, Alzheimer..

insulin molecules Stock Photo

#53761228 - insulin molecules

Dust mites closeup

#52696885 - Dust mites closeup

Dust mites, their excretions are induce allergic reactions in humans

#52696884 - Dust mites, their excretions are induce allergic reactions in..

Dust mites

#52696882 - Dust mites

Zika virus Stock Photo

#52503740 - Zika virus

Insulin binding to the Insulin Receptor

#51270708 - Insulin binding to the Insulin Receptor

Neuron marked by fluorescence

#50617267 - Neuron marked by fluorescence

Stem Cells

#48716054 - Stem Cells

Peptic ulcer Stock Photo

#48510817 - Peptic ulcer

Alzheimers disease, neurons with amyloid plaques

#46572772 - Alzheimers disease, neurons with amyloid plaques

Occurrence of polyps in the gastrointestinal tract Stock Photo

#44144466 - Occurrence of polyps in the gastrointestinal tract

Alzheimer disease, neurons with amyloid plaques

#44110954 - Alzheimer disease, neurons with amyloid plaques

3 phases of the Alzheimer disease Stock Photo

#44110953 - 3 phases of the Alzheimer disease

Neuron Network, pyramidal neurons in Ramon y Cajals drawing style

#42557446 - Neuron Network, pyramidal neurons in Ramon y Cajals drawing style

Occurrence of ulcerative colitis in the gastrointestinal tract

#37827626 - Occurrence of ulcerative colitis in the gastrointestinal tract

Crohns disease, gastrointestinal tract

#36857774 - Crohns disease, gastrointestinal tract

Cancer cell attacked by lymphocytes Stock Photo

#36228183 - Cancer cell attacked by lymphocytes

Mold colony (Aspergillus)

#36228181 - Mold colony (Aspergillus)

View of the cell nucleus

#35712587 - View of the cell nucleus

Human lung affected by lung cancer

#35712585 - Human lung affected by lung cancer

Diverticula in the colon Stock Photo

#35489184 - Diverticula in the colon

Healthy intestine

#35034373 - Healthy intestine

Hay fever viruses

#35034371 - Hay fever viruses

In vitro fertilization Stock Photo

#35034368 - In vitro fertilization

Hay fever

#34996400 - Hay fever

Embryo, 4 cells

#34924681 - Embryo, 4 cells

Escherichia coli bacteria Stock Photo

#34855500 - Escherichia coli bacteria

Escherichia coli bacteria Stock Photo

#34855497 - Escherichia coli bacteria

Diverticula in the colon Stock Photo

#34780883 - Diverticula in the colon

Cancer cell attacked by lymphocytes Stock Photo

#34735824 - Cancer cell attacked by lymphocytes

Dividing cancer cells (proliferation)

#33976204 - Dividing cancer cells (proliferation)

Fetus, 4 months

#33615294 - Fetus, 4 months

Borrelia bacteria in the blood Stock Photo

#33612247 - Borrelia bacteria in the blood

Bacteria, bacilli

#33573410 - Bacteria, bacilli

The asteroids Lutetia, Gasprah, Ida Stock Photo

#33573409 - The asteroids Lutetia, Gasprah, Ida

Antibodies binding to HI-viruses Stock Photo

#33572894 - Antibodies binding to HI-viruses

Dust mites. Dust mites eat flakes of shed human skin and other organic detritus.

#33572887 - Dust mites. Dust mites eat flakes of shed human skin and other..

Escherichia coli bacteria Stock Photo

#33527975 - Escherichia coli bacteria

Dust mites in a mattress Stock Photo

#33478885 - Dust mites in a mattress

Norovirus. Noroviruses are transmitted from person to peron and via contaminated water and food.

#33478612 - Norovirus. Noroviruses are transmitted from person to peron and..

migrating cancer cells. Cancer cells can migrate to other body tissues or organs building metastasis Stock Photo

#33379765 - migrating cancer cells. Cancer cells can migrate to other body..

Lymphocytes in the blood Stock Photo

#33379764 - Lymphocytes in the blood

Dust mites in a mattress Stock Photo

#31475677 - Dust mites in a mattress

3d illustration of the ATP synthesis in a mitochondrion. ATP synthase couples ATP (red) synthesis from ADP and inorganic phosphate (orange) to a proton gradient (light points) created across the mitochondrial membrane during cellular respiration. Stock Photo

#103011538 - 3d illustration of the ATP synthesis in a mitochondrion. ATP..

Interaction between a T-lymphocyte (left) and a dendritic cell.endritic cells present antigens to lymphocytes through their membran bound MHC-molecules (orange).

#60596992 - Interaction between a T-lymphocyte (left) and a dendritic cell.endritic..

Approximate size comparison of a LDL left and a HDL right particle

#53611198 - Approximate size comparison of a LDL left and a HDL right particle

Low lipoprotein particle LDL

#53611139 - Low lipoprotein particle LDL

Fracking hydraulic facturing Stock Photo

#50937666 - Fracking hydraulic facturing

Antibodies binding to the influenza virus.

#47938115 - Antibodies binding to the influenza virus.

Pyramidal neuron

#39371628 - Pyramidal neuron

Cancer cell attacked by lymphocytes Stock Photo

#36228182 - Cancer cell attacked by lymphocytes

Fetus, 7 weeks Stock Photo

#33615296 - Fetus, 7 weeks

Bacteria infesting the villi of the intestinal mucosa Stock Photo

#33573411 - Bacteria infesting the villi of the intestinal mucosa

Asteroid approaching the earth

#33572962 - Asteroid approaching the earth

Antibody. Structure of antibody molecule to by by determined by X-Ray cristallography.

#33572906 - Antibody. Structure of antibody molecule to by by determined..

Ras PRotein with GDP bound. Ras proteins are involved in transmitting signals within cells turning on genes involved in cell growth, differentiation and survival. Mutations in ras genes can lead to permanently activated proteins causing cells to subdivide without control, Stock Photo

#96791067 - Ras PRotein with GDP bound. Ras proteins are involved in transmitting..

Influenza viruses Stock Photo

#75608404 - Influenza viruses

T-cell receptor in complex with the MHC class II-peptide complex. The antigen (light green) is a peptide from a tumor cell, bacteria or virus.

#60596994 - T-cell receptor in complex with the MHC class II-peptide complex...

Macrophage engulfing bacteria (cocci).Macrophages engulf and digest cellular debris and pathogens.

#56089314 - Macrophage engulfing bacteria (cocci).Macrophages engulf and..

Macrophages approaching bacteria (bacilli). Macrophages engulf and digest cellular debris and pathogens.

#56089313 - Macrophages approaching bacteria (bacilli). Macrophages engulf..

Cholesterol and atherosclerosis Stock Photo

#54940535 - Cholesterol and atherosclerosis

LDL particle binds to the LDL receptor Stock Photo

#53761410 - LDL particle binds to the LDL receptor

High lipoprotein particle HDL

#53611204 - High lipoprotein particle HDL

Antibodies binding to the virus influenza virus

#48716055 - Antibodies binding to the virus influenza virus

Endorphins, met-enkephalin

#44146747 - Endorphins, met-enkephalin

Arteriosclerosis. An artery wall thickens as a result of the acccumulation of lipids (in yellow) and calcium carbonate grains (in white).

#33572909 - Arteriosclerosis. An artery wall thickens as a result of the..

HIV-1 reverse transcriptase (RT) complexed with 30 nucleoside inhibitor (orange)

#106226107 - HIV-1 reverse transcriptase (RT) complexed with 30 nucleoside..

Chimeric antigen receptor CARs are engineered cell receptors that allow T cells to recognize and attack cancer cells in a specific way. They are built by connecting several functional parts from different proteins. In this image a signal protein (ZAP70) is attached to the intracellular domain.

#100856934 - Chimeric antigen receptor CARs are engineered cell receptors..

Âµ-, delta-, kappa-opioid receptors display a role in modulating pain perception; opioid agonists are potent analgesics. Endogenous opioids are enkephalin, dynorphin, endorphin an. 3d rendering Stock Photo

#94453625 - Âµ-, delta-, kappa-opioid receptors display a role in modulating..

Dendritic cell presenting an antigen to T-lymphocytes. The antigen is a peptide from a tumor cell, bacteria or virus. Dendritic cells present antigens to lymphocytes activating an immune response.

#92167301 - Dendritic cell presenting an antigen to T-lymphocytes. The..

Chimeric antigen receptor CARs are engineered cell receptors that allow T cells to recognize and attack cancer cells in a specific way. Stock Photo

#91438122 - Chimeric antigen receptor CARs are engineered cell receptors..

Chimeric antigen receptor CARs are engineered cell receptors that allow T cells to recognize and attack cancer cells in a specific way. They are built by connecting several functional parts from different proteins. In this image a signal protein (ZAP70) is attached to the intracellular domain.

#91273462 - Chimeric antigen receptor CARs are engineered cell receptors..

Structure of a fat cell: cell membrane (orange), large lipid droplet (yellow), nucleus (red) and various cell organells located in the periphery Stock Photo

#79884372 - Structure of a fat cell: cell membrane (orange), large lipid..

T-cell receptor in complex with the MHC class II-peptide complex. The antigen (light green) is a peptide from a tumor cell, bacteria or virus.

#60596995 - T-cell receptor in complex with the MHC class II-peptide complex...

Tuberculosis bacillus in the lungs Stock Photo

#55937358 - Tuberculosis bacillus in the lungs

A bacterial colony, bacilli Bacteria are prokaryotic microorganisms with a diversity of shapes ranging from spheres to rods and spirals.

#55935024 - A bacterial colony, bacilli Bacteria are prokaryotic microorganisms..

LDL particles in the blood stream

#54767868 - LDL particles in the blood stream

Multiresistant bacteria MRSA Stock Photo

#43527065 - Multiresistant bacteria MRSA

Pyramidal neurons

#39372112 - Pyramidal neurons

Mold colony on a carpet

#36228180 - Mold colony on a carpet

Human lung

#35712586 - Human lung

EHEC bacteria

#34855502 - EHEC bacteria

Asteroid approaching the earth

#34780888 - Asteroid approaching the earth

Structure of the DNA Stock Photo

#34780884 - Structure of the DNA

4 phases of arteriosclerosis Stock Photo

#33628943 - 4 phases of arteriosclerosis

Two neurons Transmitting a signal Stock Photo

#33572895 - Two neurons Transmitting a signal

Brain cells. The main cell types of the brain: yellow: neurons; orange: astrocytes; gray: oligodendrocytes; white: microglia. Stock Photo

#33527977 - Brain cells. The main cell types of the brain: yellow: neurons;..

Structure of ecdysterone. 20-hydroxyecdysone is a hormone which controls moulting and metamorphosis of arthropods. It also occurs in plants, like in spinach. It improves physical performance and muscle mass in humans. Ecdysterone is synthesized in insects on plants out of cholesterol. Its similar to testosterone. 3d rendering

#126486976 - Structure of ecdysterone. 20-hydroxyecdysone is a hormone which..

The gastric proton pump acidifies the gastric juice down to pH 1. It is a target for drugs that treat acid-related diseases including gastroesophageal reflux disease (GERD) and gastric and duodenal ulcers. Source: PDB entry 5yIu.

#126486975 - The gastric proton pump acidifies the gastric juice down to pH..

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123RF

About 123RF

Features

Blog

Tutorials

Services

Corporate+

123RF Partners Program

API Value-Added Reseller

Become an Affiliate

Policies

Legal

Licensing

Privacy Policy

Terms of Use

Cookie Policy - 123RF

International

Русский язык

Português (PT)

Support

Need help? Contact your dedicated Account Manager

@ 1 866 655 3733

Contact

Support

Connect with Us

Follow us on Twitter

Join us on Facebook

Connect with us on Google+

Follow us on Pinterest

Follow us on Instagram