Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
Photomicrograph of one celled amoeba. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.
Demodex folliculorum - parasitic mite on the eyelashes of a human eye, microscope
Algae under microscopic view, Diatoms, phytoplankton, fossils, silica, golden yellow
Trematode parasite under a microscope
Enterobius vermicularis (EV) eggs. parasite in stool, image under light microscopy 40X objective at medical laboratory.
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.
The nematode Steinernema feltiae under the microscope, the species used as a biopesticide to infect fungus gnats in agriculture and gardening.
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.
Microscopic image of urine granular cast and cellular cast, cause of exercise or dehydration Acute tubular necrosis. kidney diseases.
plant Flower bud of Lilium brownii var.viridulum T.S.\nunder light mircoscope with white background
Photomicrograph of rotifer, probably Rotaria rotatoria. Rapidly rotating cilia at top of head, internal organs visible. Green circles are algae. Live specimen. Original image at 40X, wet mount, transmitted brightfield illumination. Indistinct image due to motion blur of live specimen and very shallow depth of field of brightfield illumination.
Diatoms, algae under microscopic view, phytoplankton, fossils, silica, golden yellow algae
False color image of diatom under the microscope
Looking through a window underwater where limpets and saline have grown over window.
Spore bags of helminthosporium contain 8 cells. This disease causes helminthosporiosis of wheat. Soon very small and quite harmful.
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.
Microscopic examination of Stool showing Blastocystis hominis parasite.
Alternaria spore was zoom by transmission electron microscope. Alternaria is a genus of ascomycete fungi. Alternaria species are known as major plant pathogens.
Monkeypox Virus. 3D Render
Freshwater aquatic zooplankton and algae under microscope view
Ascaris lumbricoides  egg human parasite in stool examination.
Fertilized, high quality, human egg after five days just prior to transfer into the woman's uterus. Mosaic image composed of 9 sections. Also known as a blastocyst where the inner cell mass or embryoblast forms the embryo. The outer layer of cells are the trophoblast.
Host cells with spores (mold) are inside wood under the microscope for education.
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.
Synedra ulna (unicellular freshwater diatom algae) under the microscope - optical microscope x400 magnification
Mucinous carcinoma of the lung. Pleural effusion. PAP stain. Signet ring cell.
The Microscopic World. Tap water.
Some amoebas like this one form shells. Shell is composed of bits of rock (sand), diatom shells, and other debris. Fresh water. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.
Free Images: "bestof:Cnidocystes d'Aptasia couchii.jpg fr Cnidocystes cellules urticantes de 120 μm d' Aiptasia couchii trouvés dans le tube digestif de Berghia coerulescens"
Porte de Mons Maubeuge.jpg
Pieter_Brueghel_the_Elder_-_The_Dutch_Proverbs_-_Google_Art_Project.jpg
Haeckel Actiniae.jpg
Lindos Rhodes.jpg
Décorations rues Montignac.jpg
Forest north Euboea Greece.jpg
Améthyste 0 (Mexique).jpg
Dordogne Belvédère Domme 2.jpg
Spanische Hofreitschule chandelier.jpg
Jardin de Diane Fontainebleau.jpg
Ruelle Albayzin Grenade.jpg
Roofs Albayzin Granada Spain.jpg
Toit salle Abencerrages Alhambra Espagne.jpg
CoA House Orléans Chantilly.jpg
Fire station Vatican 12.jpg
Saxo bateau port Vannes.jpg
Stream in north Euboea Greece.jpg
Kirkegaard statue Hasselriis Copenhagen Denmark.jpg
Chapelle Finistère.jpg
West Texas Pumpjack.JPG
Ferry Blue star 1 Rhodes.jpg
Laugerie basse guetteur 1.jpg
Isabel Ferdinand Christoph Colombus Alcazar Cordoba.jpg
Fontaines plaque jardin Sultane Generalife Granada Spain.jpg
Cnossos 4 Staircase.jpg
Comminge_by_Claudius_Jacquand_2.jpg
Vault perspective Rhodes.jpg
Drapeaux grec église orthodoxe.jpg
Louis Majesty Rhodes 2.jpg
Escalier monumental Neue Burg Vienne.jpg
Fronton linteau Hofburg.jpg
Masque 2 porte du Baptistère Fontainebleau.jpg
Panneau parc Château de Champs sur Marne.jpg
Patio de la Sultana detail Generalife Granada Spain.jpg
Apse Saint Peter's Basilica Vatican City.jpg
Minoan jar Knossos Palace.jpg
Boat Chania.jpg
Seven Seas Mariner Vesuvius.jpg
Prevelis Piraeus.jpg
Louis_Abelly_dans_Gallica.jpg
Sankt Peters kirke courtyard Copenhagen Denmark.jpg
Forum Pompei various columns.jpg
La Roque-Gageac Dordogne.jpg
Rangers réglementaires de l'Armée Française.png
Jardin de la Sultane.jpg
Zwiefalten 28 04 2011 Angels 04.jpg
Boat bateau Panormittis Symi.jpg
Keukenhof tulipes roses et vertes.JPG
Fau de la Demoiselle Verzy 23 10 2011 2.jpg
MAP Expo Maori Epingle 30 12 2011 1.jpg
Kaiser Franz Joseph of Austria sarcophagus Kapuzinergruft Wien Vienna.jpg
Privy garden Schönbrunn winter.jpg
Musée du Quai Branly Papouasie Karahut 04032012 2.jpg
Coupe montée empereur Maximilien Mexico Silberkammer Hofburg Vienne N 168 169.jpg
Panneau plan domaine Fontainebleau.jpg
Masque 1 porte baptistère Fontainebleau.jpg
Fontaine Puerta del Perdon cathédrale Séville Espagne.jpg
Tower convento San Francisco Parador Granada Spain.jpg
Garden of the Alcoba's arbour real alcazares Seville Spain.jpg
Columns arches Patio de los Leones, Alhambra, Granada, Andalusia, Spain.jpg
Corner arches, Patio de los Leones, Alhambra, Granada, Spain.jpg
Detail venetian fortress harbour Heraklion.jpg
Entrée port La Rochelle août 2015 Charente-Maritime.jpg
Antonin_Artaud_1926.jpg
StDenis.jpg
City walls Kerameikos Athens.jpg
Saint-Saturnin Rue de l'Enfer.JPG
Stresa Isola Bella 17.JPG
Verrière de Saint-Martin 2.jpg
Ceiling salle des Abencerrajes alhambra.jpg
YuMZ-6KL tractor 2011 G1.jpg
Beach of Villeneuve-Loubet with snow on the Alps.jpg
Fontaine des Quatre-Parties-du-Monde 20 11 2010 02.jpg
Gate walls grand master palace Rhodes.jpg
Louis Majesty Rhodes.jpg
Tomb Rossini Florence.jpg
Foudre Hall of Mirrors Versailles.jpg
Chene Fau Verzy 23 10 2011 3.jpg
MAP Expo Maori Hameçon 13012012 1.jpg
MAP Expo Maori Hei tiki 15 01 2012 2.jpg
MAP Expo Maori Hei tiki 15 01 2012 1.jpg
Spanish Riding School arena Vienna detail.jpg
Amalienburg clock tower sundial Hofburg Vienna.jpg
Gargouille style gothique Banque de France 17ème Paris.jpg
Dauphin détail lampadaire Louvre.jpg
Bishop Nuestra Señora de las Angustias, Granada, Spain.jpg
Escalier Castille Leon Alcazar Seville Spain.jpg
Detail ceiling two sisters hall Alhambra Granada Spain.jpg
Real Maestranza Loge Royale Seville Spain.jpg
Maison de Victor Hugo Salon chinois 271220120 02.jpg
Catamaran Lui et Moi by Anne Caseneuve, gulf of Morbihan, France.jpg
Christian keep, Alcazaba, Almeria, Spain.jpg
Details stuccos and mosaics Cuarto dorado Alhambra, Granada, Andalusia, Spain.jpg
Side door Patio de los Arrayanes, Alhambra, Granada, Andalusia, Spain.jpg
Statue Virgin Mary Monastery San Hieronimo, Granada, Andalusia, Spain.jpg
Throne of Minos at Knossos Palace.jpg
Three stone thrones Dyonisos Theater Athens Greece.jpg
Seven Seas Mariner and friends gulf Naples Italy.jpg
Excavations wall 1959 Phaestos Crete.jpg
Agios Nikolaos Port Aegina.jpg
Terms of Use   Search of the Day