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500 results

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    Red blood cells — Stock Photo
    Red blood cells
    Clothes moth wing scales — Stock Photo
    Clothes moth wing scales
    Hepatic bile duct infected with cocidian protozoa — Stock Photo
    Hepatic bile duct infected with cocidian protozoa
    Section of a muscular artery — Stock Photo
    Section of a muscular artery
    Acrospaera radiolarian shell — Stock Photo
    Acrospaera radiolarian shell
    Electron micrograph of dental plaque — Stock Photo
    Electron micrograph of dental plaque
    Silica wall of a diatom — Stock Photo
    Silica wall of a diatom
    Shell of a radiolarian — Stock Photo
    Shell of a radiolarian
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Closeup of magnified grey head of flying insect with round convex brown eyes — Stock Photo
    Closeup of magnified grey head of flying insect with round convex brown eyes
    Side view of orange fluffy flying incest with brown antennae and ornamental large eye — Stock Photo
    Side view of orange fluffy flying incest with brown antennae and ornamental large eye
    Focused jeweler working in workshop — Stock Photo
    Focused jeweler working in workshop
    Illustration of 4 cell stage egg on black background. — Stock Photo
    Illustration of 4 cell stage egg on black background.
    Digital artwork of white blood cells attacking red illuminated cancer cell. — Stock Photo
    Digital artwork of white blood cells attacking red illuminated cancer cell.
    Common house dust mite — Stock Photo
    Common house dust mite
    Adenocarcinoma of the thyroid gland — Stock Photo
    Adenocarcinoma of the thyroid gland
    Boy standing by ocean looking through a telescope — Stock Photo
    Boy standing by ocean looking through a telescope
    Breast with lobular carcinoma — Stock Photo
    Breast with lobular carcinoma
    Closeup of magnified part of black and brown ant with glossy head — Stock Photo
    Closeup of magnified part of black and brown ant with glossy head
    Dust mite on skin surface — Stock Photo
    Dust mite on skin surface
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria. — Stock Photo
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria.
    Asparagus pollen grains — Stock Photo
    Asparagus pollen grains
    Cat flea head — Stock Photo
    Cat flea head
    Digital illustration of green cancer cells. — Stock Photo
    Digital illustration of green cancer cells.
    Hair follicles of human skin — Stock Photo
    Hair follicles of human skin
    Side view of black glossy flying incest with threatening antennae large eyes and transparent wing — Stock Photo
    Side view of black glossy flying incest with threatening antennae large eyes and transparent wing
    Illustration of 2 cell stage egg on black background. — Stock Photo
    Illustration of 2 cell stage egg on black background.
    Illustration of blue illuminated cancer cell. — Stock Photo
    Illustration of blue illuminated cancer cell.
    Nerve bundle from the sciatic nerve — Stock Photo
    Nerve bundle from the sciatic nerve
    Activated platelet from peripheral blood — Stock Photo
    Activated platelet from peripheral blood
    Campylodiscus fastuosus diatom — Stock Photo
    Campylodiscus fastuosus diatom
    Coloured scanning electron micrograph (SEM) of the shell (test) of a Globigerina sp. planktonic foraminiferan. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the shell (test) of a Globigerina sp. planktonic foraminiferan.
    Girl student using microscope in classroom — Stock Photo
    Girl student using microscope in classroom
    Woman with mole on shoulder being examined through dermatoscope. — Stock Photo
    Woman with mole on shoulder being examined through dermatoscope.
    Colored digital illustration of green cancer cell. — Stock Photo
    Colored digital illustration of green cancer cell.
    Students and teacher using binoculars in forest — Stock Photo
    Students and teacher using binoculars in forest
    Bacteriastrum sp. diatom algae — Stock Photo
    Bacteriastrum sp. diatom algae
    Shell of a radiolarian — Stock Photo
    Shell of a radiolarian
    Illustration of 4 cell stage egg on black background. — Stock Photo
    Illustration of 4 cell stage egg on black background.
    Freshwater single diatom — Stock Photo
    Freshwater single diatom
    Parasitic trematode larva — Stock Photo
    Parasitic trematode larva
    Eye test equipment in a laboratory — Stock Photo
    Eye test equipment in a laboratory
    Coloured scanning electron micrograph of Staphylococcus aureus bacteria. — Stock Photo
    Coloured scanning electron micrograph of Staphylococcus aureus bacteria.
    Human blood cells — Stock Photo
    Human blood cells
    Closeup of magnified part of black and brown ant with legs — Stock Photo
    Closeup of magnified part of black and brown ant with legs
    Digital artwork of white blood cells attacking red illuminated cancer cell. — Stock Photo
    Digital artwork of white blood cells attacking red illuminated cancer cell.
    Male doctor examining young woman using magnification lamp. — Stock Photo
    Male doctor examining young woman using magnification lamp.
    Freshwater single diatom — Stock Photo
    Freshwater single diatom
    Lactating breast tissue — Stock Photo
    Lactating breast tissue
    Woman looking through spotting scope, Wyoming, USA — Stock Photo
    Woman looking through spotting scope, Wyoming, USA
    Platelets in blood vessel — Stock Photo
    Platelets in blood vessel
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria. — Stock Photo
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria.
    Focused boy students using digital tablet and microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Focused boy students using digital tablet and microscope, conducting scientific experiment in laboratory classroom
    Girl students using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl students using microscope, conducting scientific experiment in laboratory classroom
    Structure of islet of langerhans, light micrograph. — Stock Photo
    Structure of islet of langerhans, light micrograph.
    Illustration of illuminated red human cancer cell. — Stock Photo
    Illustration of illuminated red human cancer cell.
    Female hiker looking through binoculars, Utah, United States — Stock Photo
    Female hiker looking through binoculars, Utah, United States
    Enterococcus coccoid bacteria, colored scanning electron micrograph. — Stock Photo
    Enterococcus coccoid bacteria, colored scanning electron micrograph.
    House dust mites — Stock Photo
    House dust mites