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    Osteoblasts. Colored transmission electron micrograph (TEM) of osteoblasts, bone-producing cells (purple and pink). They contain rough endoplasmic reticulum (RER), which produces, modifies and transports proteins, and nucleus — Stock Photo
    Osteoblasts. Colored transmission electron micrograph (TEM) of osteoblasts, bone-producing cells (purple and pink). They contain rough endoplasmic reticulum (RER), which produces, modifies and transports proteins, and nucleus
    Methicillin-resistant Staphylococcus aureus — Stock Photo
    Methicillin-resistant Staphylococcus aureus
    Magnified digital illustration of blastocyst cell. — Stock Photo
    Magnified digital illustration of blastocyst cell.
    Female laboratory technician using microscope in lab. — Stock Photo
    Female laboratory technician using microscope in lab.
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans — Stock Photo
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans
    Science professor helping college student conducting scientific experiment in science laboratory classroom — Stock Photo
    Science professor helping college student conducting scientific experiment in science laboratory classroom
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is brown. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (blue) contain enzymes for digesting foreign particles — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is brown. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (blue) contain enzymes for digesting foreign particles
    Tongue surface, light micrograph and computer illustration. — Stock Photo
    Tongue surface, light micrograph and computer illustration.
    Male scientist using microscope in laboratory — Stock Photo
    Male scientist using microscope in laboratory
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (blue) and jaws. Magnification: x50 when printed 10 centimetres wide. — Stock Photo
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (blue) and jaws. Magnification: x50 when printed 10 centimetres wide.
    University students practicing science experiment in lab — Stock Photo
    University students practicing science experiment in lab
    Close-up of teenage girl using microscope in lab — Stock Photo
    Close-up of teenage girl using microscope in lab
    Schizosaccharomyces pombe yeast — Stock Photo
    Schizosaccharomyces pombe yeast
    Coloured scanning electron micrograph of cancer cells migrating down pores. — Stock Photo
    Coloured scanning electron micrograph of cancer cells migrating down pores.
    Crystalline lens of the eye — Stock Photo
    Crystalline lens of the eye
    Close-up of hands of scientist placing slide with human sample under light microscope for medical testing. — Stock Photo
    Close-up of hands of scientist placing slide with human sample under light microscope for medical testing.
    Vaccinia virus particle — Stock Photo
    Vaccinia virus particle
    Female college student using microscope while practicing experiment in lab — Stock Photo
    Female college student using microscope while practicing experiment in lab
    Teenage boy experimenting on microscope in laboratory at university — Stock Photo
    Teenage boy experimenting on microscope in laboratory at university
    Colored scanning electron micrograph of osteosarcoma bone cancer cell. — Stock Photo
    Colored scanning electron micrograph of osteosarcoma bone cancer cell.
    Girl students using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl students using microscope, conducting scientific experiment in laboratory classroom
    Microvilli from the small intestine — Stock Photo
    Microvilli from the small intestine
    Medical researcher examining a new medicine. science student dressed in white lab coat looking through a microscope. — Stock Photo
    Medical researcher examining a new medicine. science student dressed in white lab coat looking through a microscope.
    Scientist using microscope in laboratory — Stock Photo
    Scientist using microscope in laboratory
    Light micrograph of liver fluke eggs in a fish scale. — Stock Photo
    Light micrograph of liver fluke eggs in a fish scale.
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    University student writing on clipboard while doing experiment in laboratory — Stock Photo
    University student writing on clipboard while doing experiment in laboratory
    Iris stem cellular structure — Stock Photo
    Iris stem cellular structure
    Mycobacterium smegmatis bacteria — Stock Photo
    Mycobacterium smegmatis bacteria
    Female cell biologist placing flask containing stem cells cultivated in red growth medium under microscope. — Stock Photo
    Female cell biologist placing flask containing stem cells cultivated in red growth medium under microscope.
    Retina. Light micrograph of a section through the retina showing its 10 layers. — Stock Photo
    Retina. Light micrograph of a section through the retina showing its 10 layers.
    Laboratory assistant using polarizing microscope in microbiological laboratory. — Stock Photo
    Laboratory assistant using polarizing microscope in microbiological laboratory.
    Scientist examining cultured cells under microscope. — Stock Photo
    Scientist examining cultured cells under microscope.
    Colored scanning electron micrograph of coccoliths calcium carbonate plates from coccolithophore algal organisms. — Stock Photo
    Colored scanning electron micrograph of coccoliths calcium carbonate plates from coccolithophore algal organisms.
    Od shaped bacteria Tragelaphus — Stock Photo
    Od shaped bacteria Tragelaphus
    Female researcher analyzing samples with microscope in the laboratory — Stock Photo
    Female researcher analyzing samples with microscope in the laboratory
    Female student using microscope while practicing experiment in lab — Stock Photo
    Female student using microscope while practicing experiment in lab
    Unilocular adipose tissue — Stock Photo
    Unilocular adipose tissue
    B-lymphocyte white blood cells — Stock Photo
    B-lymphocyte white blood cells
    Lime tree stem — Stock Photo
    Lime tree stem
    Nipah virus particles, computer illustration. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore in people who had close contact with pigs — Stock Photo
    Nipah virus particles, computer illustration. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore in people who had close contact with pigs
    Schoolboy putting leaves on microscope slide in school laboratory. — Stock Photo
    Schoolboy putting leaves on microscope slide in school laboratory.
    Female scientists working in laboratory. — Stock Photo
    Female scientists working in laboratory.
    Myelinated nerve fibres — Stock Photo
    Myelinated nerve fibres
    Leukaemia blood cells — Stock Photo
    Leukaemia blood cells
    Section through an osteoid osteoma — Stock Photo
    Section through an osteoid osteoma
    Close-up of hand in glove adjusting microscope slide. — Stock Photo
    Close-up of hand in glove adjusting microscope slide.
    Angel trumpets pollen grain — Stock Photo
    Angel trumpets pollen grain
    Ophthalmologist performing eye surgery on female patient in clinic. — Stock Photo
    Ophthalmologist performing eye surgery on female patient in clinic.
    Close-up of hands of scientist placing slide with human sample under light microscope for medical testing. — Stock Photo
    Close-up of hands of scientist placing slide with human sample under light microscope for medical testing.
    Simple cuboidal epithelium, digital illustration. — Stock Photo
    Simple cuboidal epithelium, digital illustration.
    Hyaline cartilage, a semi-rigid connective tissue — Stock Photo
    Hyaline cartilage, a semi-rigid connective tissue
    Fungal cells showing sporangium — Stock Photo
    Fungal cells showing sporangium
    Measles virus particle, illustration. This virus, from the Morbillivirus group of viruses, consists of an RNA (ribonucleic acid) core surrounded by an envelope studded with surface proteins haemagglutinin-neuraminidase and fusion protein — Stock Photo
    Measles virus particle, illustration. This virus, from the Morbillivirus group of viruses, consists of an RNA (ribonucleic acid) core surrounded by an envelope studded with surface proteins haemagglutinin-neuraminidase and fusion protein
    Illustration of Nipah viruses binding to receptors on human cells, an initial stage of Nipah infection. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore — Stock Photo
    Illustration of Nipah viruses binding to receptors on human cells, an initial stage of Nipah infection. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore
    Female scientists using microscopes in lab — Stock Photo
    Female scientists using microscopes in lab
    Simple cuboidal epithelium, digital illustration. — Stock Photo
    Simple cuboidal epithelium, digital illustration.
    Red blood cells with fibrin — Stock Photo
    Red blood cells with fibrin
    Light micrograph of a section through breast tissue showing mastitis (inflammation) of breast. — Stock Photo
    Light micrograph of a section through breast tissue showing mastitis (inflammation) of breast.
    Colored scanning electron micrograph of Liposcelis divinatorius booklouse. — Stock Photo
    Colored scanning electron micrograph of Liposcelis divinatorius booklouse.