Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
Squash preparation of stained onion root tip cells showing late telophase and metaphase stages of mitosis. Bright field illumination on a Leica microscope, Image taken with the X100 objective lens.  Depth of focus is extremely shallow (less than one micron).  Optimum setting of the aperture for maximum resolution and good contrast. Chromatic aberation is inevitable in light microscopy, especially at this scale of magnification, but has been kept to a minimum in this image.
Epithelial Cells in urine sediment.
Epidermis. Electron microscope micrograph showing a keratinocyte of spinous layer. The epithelial cell has a polygonal shape, central nucleus with nucleolus, cytoplasm full of keratin filament bundles, and numerous dark desmosomes crossing the intercellular spaces.
Aspergillus fumigatus is one of the most common Aspergillus species to cause disease in individuals with an immunodeficiency. This pathogen primarily causes invasive infection in the lung.
Background of mold in the wood of the house.
Microscopic image of blood
amazing inhabitants of the microworld under a microscope
Trematode parasite under a microscope
The slide demonstrating the glomerulus, proximal and distal tubules and the collecting ducts.
Number 1 Pattern Design on Banknote
Outer stripe of the outer medulla of the kidney. 0.5 µm thick section of material embedded in plastic, stained with toluidine blue. The image shows several proximal convoluted tubules in which can be distinguished: the brush border limiting the lumen, the lysosomes, visible in the form of cytoplasmic granules of deep blue color and, especially in the tubules located below in the center, basal infoldings.
plant Stem of Nymphaea tetragona T.S. under light mircoscope with white background
Squash preparation of stained onion root tip cells showing various stages of mitosis. Differential interference contrast optics on a Leica microscope, Image taken with the X40 objective lens.  Depth of focus is extremely shallow (just a few microns).  Differential interference contrast results in an optical slice horizontally through the specimen providing maximum possible resolution at this magnification and good contrast. Chromatic abberation is inevitable in light microscopy, but has been kept to a minimum in this image.
An electron image of several nanoparticles made of lipids (liposomes) containing an anticancer drug (doxorubicin)
Symbolic illustration of infectious viruses under the microscope, for example influenza viruses, smallpox, measles or similar. Medical research and investigation of diseases and healthcare concept.
Natural agate surfaces, suitable for backgrounds and wallpapers.
Transmition Electron microscopy of an epithelial cell where mitochondria of several sizes can be seen with the characteristic double membrane and internal cristaes. Mitochondria are believed to be of bacteria origin. It has its own genome and RNA and protein which are similar to those of bacteria.
Burkitt lymphoma is a form of non-Hodgkin's lymphoma in which cancer starts in immune cells called B-cells. Recognized as a fast growing human tumor, Burkitt lymphoma is associated with impaired immunity and is rapidly fatal if left untreated.
Epidermis. Electron microscope micrograph of an epidermis spinous layer. The keratinocytes show polygonal shapes, central nucleus with nucleolus, cytoplasm full of keratin filament bundles, and numerous desmosomes crossing the intercellular spaces.
Aspergillus fumigatus is one of the most common Aspergillus species to cause disease in individuals with an immunodeficiency. This pathogen primarily causes invasive infection in the lung.
Fluke(Parasitic flatworm) of cattle and other grazing animals.
Squash preparation of  onion root tip cells stained to reveal chromosomes,  Bright field illumination, light microscopy.  This image was taken with the X40 objective lens.  Depth of focus is extremely low at this magnification.  Smaller apertures give greater depth of focus, but image quality deteriorates and resolution is greatly reduced.  The aperture in this image was optimised for contrast and resolution. Chromatic abberation is inevitable in light microscopy, but has been kept to a minimum in this image.
Alternaria spore was zoom by transmission electron microscope. Alternaria is a genus of ascomycete fungi. Alternaria species are known as major plant pathogens.
Photomicrograph of newly hatched freshwater leech. Note multiple eyes at head and second attachment sucker at tail. Body length approx. 3 mm. Live specimen. Wet mount, 5X objective, transmitted brightfield illumination.
amazing inhabitants of the microworld under a microscope
Urothelial carcinoma, high grade.  High-grade tumors have an aggressive appearance under a microscope and are assumed invasive in the kidney or ureter.
Light micrograph of a lactating breast. There are numerous round alveoli, with their lumens occupied by the secretory product (milk).
Digital Dispersed corona virus on petri dish. Animation of multiplication of CORONA VIRUS COVID-19
A fixed preparation of yeast and hyphae stained with gentian violet that buds under a microscope with immersion
Squash preparation of stained onion root tip cells showing various stages of mitosis. Differential interference contrast optics on a Leica microscope, Image taken with the X40 objective lens.  Depth of focus is extremely shallow (just a few microns).  Differential interference contrast results in an optical slice horizontally through the specimen providing maximum possible resolution at this magnification and good contrast. Chromatic abberation is inevitable in light microscopy, but has been kept to a minimum in this image.
Free Images: "bestof:17p11.jpg en 17th chromosome 2003-04-28 http //fmp-8 cit nih gov/hembase/detail php chrb 17p11 The National Institute of Diabetes and Digestive and Kidney"
Chemical_synapse_schema_cropped.jpg
Geneticcounseling.jpg
Deli sandwiches.jpg
Tomato (1).jpg
Walking in a shopping mall.jpg
Kanuti_Lake_Camp_Solar_power_system.jpg
Women preparing food (2).jpg
Brown_bear_cubs_playing_in_water.jpg
Eastern_cicada_killer_wasp_(Sphecius_speciosus)_with_Cicada.jpg
Dutch_Harbor_net_pile_FWS.jpg
Cross-country_skiing_in_Alaska.jpg
Gristmill_Hopper_1938.gif
Digging an airplane out of the snow.jpg
Scammon bay village.jpg
Thomas_Cole_-_The_Voyage_of_Life_Childhood,_1842_(National_Gallery_of_Art).jpg
Thomas_Cole_-_The_Voyage_of_Life_Old_Age,_1842_(National_Gallery_of_Art).jpg
Antarctica 6400px from Blue Marble.jpg
5aday_sweet_potato.jpg
Lower Klamath NWR, Oregon.JPG
Lower Klamath Lake marsh.jpg
Oregon_Islands_National_Wildlife_Refuge.jpg
Ebola_virus_particles_found_both_as_extracellular_particles_and_budding_particles_from_chronically-infected_African_green_monkey_kidney_cells_..jpg
Polemonium vanbruntiae FWS-2.jpg
Narwhals_breach.jpg
Observation deck on shoreline.jpg
Three_Arch_Rocks_National_Wildlife_Refuge.jpg
King_Eiders.jpg
Computer_keyboard.png
Polemonium vanbruntiae FWS-1.jpg
Tobias and the Angel - Filippino Lippi.jpg
Linum_virginianum_FWS-2.jpg
Linum_virginianum_FWS-1.jpg
Above martins head.jpg
Skyway-Lake-stalactites-Wind-Cave.jpg
Dwarf crested iris flower.jpg
Oenothera biennis FWS-00.jpg
Oenothera rhombipetala FWS-00.jpg
Polemonium vanbruntiae FWS-1-4x3.jpg
Ragged_island_02.jpg
Agalinis_acuta_at_Trustom_Pond_NWR.jpg
Oenothera_rhombipetala_FWS-01.jpg
Oenothera_biennis_FWS-01.jpg
Gardens at longwood.jpeg
Kasatochi Island, Alaska Maritime NWR.jpg
Egegik Village on the Alaska Peninsula.jpg
Alaska islands and ocean visitor center bike racks.jpg
Aerial view of the trans Alaska oil pipeline.jpg
Designated wilderness marsh with oyster beds.jpg
Homelessness in Venezuela.jpg
Fiddler crabs fighting in La Restinga.jpg
Gilbert_Stuart_-_Catherine_Brass_Yates.jpg
Watsonandtheshark-original.jpg
HEUraniumC.jpg
"WIN"_football.jpg
Lilium_superbum_FWS-4x3.jpg
Oenothera_fruticosa_FWS-01.jpg
Iris_cristata_FWS-01.jpg
Viola_sororia_FWS-2.JPG
Viola_sororia_FWS-3.JPG
NMU-members-1941.jpg
VT Lacrosse and Soccer Stadium.JPG
Natural areas stone formation.jpg
Gfp-florida-biscayne-national-park-biscayne-marina.jpg
Gfp-florida-biscayne-national-park-biscayne-shoreline.jpg
Pronghorn_Antelope_USFWS.jpg
Ase_o_fuku_onna2.jpg
Thomas_Cole,_The_Voyage_of_Life,_1842,_National_Gallery_of_Art.jpg
Paolo_Veronese,_The_Conversion_of_Mary_Magdalene.jpg
Kissing_the_War_Goodbye.jpg
March_on_Washington_for_Jobs_and_Freedom.jpg
Bodie ghost town.jpg
Stinson Beach 3429.jpg
Bryce in early July at sunrise.jpg
Gfp-florida-biscayne-national-park-sea-off-the-shore.jpg
Girl scouts help replant trees.jpg
Gfp-florida-biscayne-national-park-boardwalk.jpg
Gfp-florida-biscayne-national-park-island-from-the-shore.jpg
Gfp-piano-in-parlor-room.jpg
Gfp-florida-biscayne-national-park-road-view.jpg
Gfp-florida-biscayne-national-park-lighthouse.jpg
Gfp-florida-biscayne-national-park-island-of-mangroves.jpg
Gfp-florida-biscayne-national-park-sandbar-island.jpg
Gfp-florida-biscayne-national-park-boca-chita-shoreline.jpg
Gfp-florida-biscayne-national-park-island-arc.jpg
Gfp-florida-biscayne-national-park-islandlandscape.jpg
Gfp-florida-biscayne-national-park-blue-green-water.jpg
Gfp-florida-biscayne-national-park-mangroves.jpg
Paul_Gauguin_-_Self-Portrait_with_Halo_and_Snake.jpg
A Hundred Steeds.jpg
Notre_Dame_Street,_Montreal_(1841).jpg
Thomas_Gainsborough_-_Mrs._Richard_Brinsley_Sheridan_.jpg
Valentin_de_Boulogne_-_Soldiers_Playing_Cards_and_Dice_(The_Cheats).jpg
William_Rogers_and_Lawrence_Walsh_witness_DDE_signing_the_Civil_Rights_Bill.jpg
Gfp-florida-biscayne-national-park-bait-fish-swimming-in-the-shallows.jpg
Gfp-florida-biscayne-national-park-birds-resting-on-rocks.jpg
Girl scouts in nature.jpg
Lake floatplane wake.jpg
Gfp-florida-biscayne-national-park-scenic-view.jpg
Gfp-florida-biscayne-national-park-tree-on-shore.jpg
Gfp-florida-biscayne-national-park-lighthouse-up-close.jpg
Terms of Use   Search of the Day