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Blue colored stem cells of a lentil plant under the microscope.
Natural agate surfaces, suitable for backgrounds and wallpapers.
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.
Blastomycosis is a fungal infection caused by inhaling Blastomyces dermatitidis spores. If it involves only the lungs, it is called pulmonary blastomycosis. Only about half of people with the disease have symptoms, which can include fever, cough, night sweats, muscle pains, weight loss, chest pain, and feeling tired.
Backgrounds of Bacteria and Mold under the microscope in Lab.
Photomicrograph of two rotifers. Rapidly rotating cilia at top of heads, internal organs visible. Live specimen. Wet mount, 10X objective, transmitted brightfield illumination.
A micrograph of nanoparticles made of lipids containing an anticancer drug; modern drug delivery strategies for  cancer treatments
corn stem micrograph with dye
Metastatic plasmacytoma, metastatic undifferentiated sarcoma. Microscopically show cellular material of mostly plasmacytiod cells. atypical mitoses are present. plasma cell tumor.
Particles, medical concept
Blood cell formation from bone marrow.Acute lymphoblastic leukemia(ALL),fine with microscope(100x)
Pheochromocytoma, Site: Adrenal gland
Microscope photo of a sambucus stem with parenchyma cells.
plant Zea Stem C.S. under light mircoscope with white background
Streptococcus pyogenes infected in aged patient, showing of gram's stain from positive hemoculture.
Slice of natural crystal for patterns and textures use with high resolution.
Microscopic preparation, tissue plant
Hospital wastewater contain high abundances of antibiotic resistance genes compared to municipal wastewater. The antibiotic-resistant organisms  originate from hospital patients.
Histological Cerebellum human, Sympathetic ganglion human And Spinal cord human under the microscope for education.
Focal nodular hyperplasia (FNH) is a benign liver lesion that is composed of a proliferation of hyperplastic hepatocytes surrounding a central stellate scar. Typically, FNH is a solitary lesion that is more commonly seen in women.
PAPS Smear study of a young women under microscopy showing Atrophic changes in uterus which is unusual at young age.
Photomicrograph of filamentous blue-green algae, Oscillatoria species. Each band along the stand is one cell. This filament is very short probably having recently parted from a longer one. Filaments are typically many times longer. This algae is mobile, it moves and twists through the water. San Francisco Bay, California, USA. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination. Note - motion blur of live specimen, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.
An electron image represents several nanoparticles made of lipids (liposomes) containing an anticancer drug (doxorubicin)
Liver Fluke Section under light microscope with white background
Moderate white blood cells inflammatory response.
Macro photography of Crystal texture background, nature pattern.
TURBT: Urinary bladder cancer, Transitional cell carcinoma, show urinary bladder mucosa, malignant neoplasm, 40x view
Myxoid liposarcoma.  Myxoid/round cell liposarcoma, or MRCLS, is one of several types of liposarcoma. Liposarcoma is a rare cancer that grows in the cells that store fat in the body. MRCLS usually grows in the arms and legs. These tumors grow slowly, and they can spread to other parts of the body
Algae, a unicellular organism
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:Plasmodium.jpg A thin-film Giemsa stained micrograph of ring-forms and gametocytes of Plasmodium falciparum From http //phil cdc gov/phil/home asp ID 5856 en"
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Polemonium vanbruntiae FWS-2.jpg
American goldfinch.jpg
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Observation deck on shoreline.jpg
Coreopsis major FWS-1 4x3.jpg
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Orthoporus spp New Mexico.jpg
Dwarf crested iris flower.jpg
Desert catchfly.jpg
Oenothera biennis FWS-00.jpg
Oenothera rhombipetala FWS-00.jpg
Phrynosoma hernandesi short horned lizard.jpg
Female loggerhead sea turtle caretta caretta.jpg
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Ulak_Island_Delarof_Islands.jpg
Mae_West_life_preserver.jpg
Miners at the American Radiator Mine, Mount Pleasant, Westmoreland County, Pennsylvania Digital ID- (digital file from original neg.) fsa 8a00958 http- hdl.loc.gov loc.pnp fsa.8a00958.jpg
Miners at American Radiator Mine, Mount Pleasant, Westmoreland County, Pennsylvania Digital ID- (digital file from original neg.) fsa 8a00946 http- hdl.loc.gov loc.pnp fsa.8a00946.jpg
Dwarf crested iris iris cristata purple flower.jpg
Dwarf crested iris flower in field plant.jpg
Viola pubescens scabriuscula FWS-1.jpg
Polemonium vanbruntiae FWS-1-4x3.jpg
Clintons lily clintonia umbellulata.jpg
Designated wilderness marsh with oyster beds.jpg
Three_cheetahs_sitting.jpg
Lilium_superbum_FWS-4x3.jpg
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Southern blue flag iris plant iris versicolor with yellow accented blossom.jpg
Kotzebue, Alaska.jpg
Southern blue flag iris flower with purple blue accents blossom in long grass.jpg
SnowflakesWilsonBentley.jpg
AH-1W_Super_Cobra_assigned_to_HMLA_167.jpg
USS-Georgia-Submarine-Kings-Bay.jpg
Girl scouts in nature.jpg
Lake floatplane wake.jpg
Church in winter scenic.jpg
Isotria verticillata USFWS-1.jpg
Lunch on a wing.jpg
Permanent wooden structure used for wildlife observation.jpg
Kasatochi Island, Alaska Maritime NWR.jpg
Aerial view of brooks range Alaska.jpg
Alaska range small waterfall on river.jpg
Alaska islands and ocean visitor center bike racks.jpg
Homelessness in Venezuela.jpg
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False foxglove flower aureolaria flava.jpg
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A-New-York-City-Fireman.jpg
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Crewmembers-walk-across-the-ships-flight-deck-before-the-sun-sets.jpg
An-F14-Tomcat-assigned-to-the-Checkmates-launches.jpg
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Naval-Special-Warfare-Unit-One-perform-a-freefall-jump.jpg
The-Coast-Guard-Cutter-Adak-WPB-1333.jpg
An-F14B-Tomcat-from-Fighter-Attack-Squadron-One-Zero-Three.jpg
Sailors-aboard-USS-Sides.jpg
Naval-Air-Station.jpg
Speech-Bubbles.jpg
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Delhi sands flower loving fly rhaphiomidas terminatus abdominalis.jpg
Field camp on Alaska in winter.jpg
Wooden signpost at the crossroads.jpg
Girl scouts help replant trees.jpg
Girl scouts in frog survey.jpg
Egegik Village on the Alaska Peninsula.jpg
Aerial view of the trans Alaska oil pipeline.jpg
An_F-A-18C_Hornet_launches_from_the_flight_deck_of_the_conventionally_powered_aircraft_carrier.jpg
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