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    Scientist viewing sample on glass slide under light microscope. — Stock Photo
    Scientist viewing sample on glass slide under light microscope.
    Longitudinal section through smooth muscle — Stock Photo
    Longitudinal section through smooth muscle
    Breast with lobular carcinoma — Stock Photo
    Breast with lobular carcinoma
    Cross-section through a cotton stem — Stock Photo
    Cross-section through a cotton stem
    Onion cells undergoing mitosis — Stock Photo
    Onion cells undergoing mitosis
    Female researcher using light microscope for examining stem cells in culture jar. — Stock Photo
    Female researcher using light microscope for examining stem cells in culture jar.
    Researcher handling stem cell cultures in laboratory during research. — Stock Photo
    Researcher handling stem cell cultures in laboratory during research.
    Scientist viewing sample on glass slide before light microscope. — Stock Photo
    Scientist viewing sample on glass slide before light microscope.
    Light microscope objective lenses in laboratory. — Stock Photo
    Light microscope objective lenses in laboratory.
    Thyroid gland showing the follicles — Stock Photo
    Thyroid gland showing the follicles
    Onion cells undergoing mitosis — Stock Photo
    Onion cells undergoing mitosis
    Scientist examining cultured cells under microscope. — Stock Photo
    Scientist examining cultured cells under microscope.
    Light microscope objective lenses in laboratory. — Stock Photo
    Light microscope objective lenses in laboratory.
    Light micrograph of blood cells (mainly B cells, dark purple) in the liver of a patient with lymphocytic leukaemia. — Stock Photo
    Light micrograph of blood cells (mainly B cells, dark purple) in the liver of a patient with lymphocytic leukaemia.
    Close-up of light microscope stage and lenses. — Stock Photo
    Close-up of light microscope stage and lenses.
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Light micrograph (LM). Longitudinal section through the thallus and sporangium of a liverwort (Pellia epiphylla). — Stock Photo
    Light micrograph (LM). Longitudinal section through the thallus and sporangium of a liverwort (Pellia epiphylla).
    Female scientist researching sample in petri dish under light microscope. — Stock Photo
    Female scientist researching sample in petri dish under light microscope.
    Hands of scientist researching sample in petri dish under light microscope. — Stock Photo
    Hands of scientist researching sample in petri dish under light microscope.
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Light microscope with petri dishes on blue background. — Stock Photo
    Light microscope with petri dishes on blue background.
    Light micrograph (LM) of the nasal sinuses ( lined by brown epithelium ) and the supporting cartilages (pink). — Stock Photo
    Light micrograph (LM) of the nasal sinuses ( lined by brown epithelium ) and the supporting cartilages (pink).
    Female researcher using light microscope for examining stem cells in culture jar. — Stock Photo
    Female researcher using light microscope for examining stem cells in culture jar.
    Young pine tree stem — Stock Photo
    Young pine tree stem
    Section of a flower bud — Stock Photo
    Section of a flower bud
    Skull affected by Paget's disease — Stock Photo
    Skull affected by Paget's disease
    Villi of the intestine — Stock Photo
    Villi of the intestine
    Female researcher using light microscope, close-up. — Stock Photo
    Female researcher using light microscope, close-up.
    Kidney with acute nephritis — Stock Photo
    Kidney with acute nephritis
    Hand of scientist researching sample on microscope slide under light microscope. — Stock Photo
    Hand of scientist researching sample on microscope slide under light microscope.
    Tongue surface, light micrograph and computer illustration. — Stock Photo
    Tongue surface, light micrograph and computer illustration.
    Close-up of light microscope stage and lenses. — Stock Photo
    Close-up of light microscope stage and lenses.
    Female scientist examining sample from culture in Petri dish. — Stock Photo
    Female scientist examining sample from culture in Petri dish.
    Fallopian tube cellular structure — Stock Photo
    Fallopian tube cellular structure
    Close-up of hands of scientist pipetting sample from culture in Petri dish. — Stock Photo
    Close-up of hands of scientist pipetting sample from culture in Petri dish.
    Glass slide containing human sample under light microscope for medical testing. — Stock Photo
    Glass slide containing human sample under light microscope for medical testing.
    Section through a Pacinian corpuscle — Stock Photo
    Section through a Pacinian corpuscle
    Examining cultured cells under microscope, close-up. — Stock Photo
    Examining cultured cells under microscope, close-up.
    Male hand opening agar plate for microbiology research. — Stock Photo
    Male hand opening agar plate for microbiology research.
    Section through a wart — Stock Photo
    Section through a wart
    Light micrograph (LM) showing blood supply to muscle fibers. — Stock Photo
    Light micrograph (LM) showing blood supply to muscle fibers.
    Cropped view of scientist hands pipetting sample for biological research. — Stock Photo
    Cropped view of scientist hands pipetting sample for biological research.
    Cell cultures under microscope in laboratory. — Stock Photo
    Cell cultures under microscope in laboratory.
    Close-up of hands of scientist examining sample from culture in Petri dish. — Stock Photo
    Close-up of hands of scientist examining sample from culture in Petri dish.
    Section through an osteoid osteoma — Stock Photo
    Section through an osteoid osteoma
    Lily flower anther — Stock Photo
    Lily flower anther
    Light micrograph (LM) of the nasal sinuses ( lined by brown epithelium ) and the supporting cartilages (pink). — Stock Photo
    Light micrograph (LM) of the nasal sinuses ( lined by brown epithelium ) and the supporting cartilages (pink).
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Laboratory worker pipetting liquid into microcentrifuge tube. — Stock Photo
    Laboratory worker pipetting liquid into microcentrifuge tube.
    Omentum fold of peritoneal membrane — Stock Photo
    Omentum fold of peritoneal membrane
    Hair follicles of human skin — Stock Photo
    Hair follicles of human skin
    Light micrograph of a section through tissue showing an artery (middle ) and a vein (top left). — Stock Photo
    Light micrograph of a section through tissue showing an artery (middle ) and a vein (top left).
    Female scientist researching sample in petri dish under light microscope. — Stock Photo
    Female scientist researching sample in petri dish under light microscope.
    Tendon showing the parallel collagen fibres — Stock Photo
    Tendon showing the parallel collagen fibres
    Duct is lined with pseudostratified epithelium — Stock Photo
    Duct is lined with pseudostratified epithelium
    Bone marrow cellular structure — Stock Photo
    Bone marrow cellular structure
    Light micrograph (LM). Longitudinal section through the thallus and sporangium of a liverwort (Pellia epiphylla). — Stock Photo
    Light micrograph (LM). Longitudinal section through the thallus and sporangium of a liverwort (Pellia epiphylla).
    Section through a nasal polyp — Stock Photo
    Section through a nasal polyp
    Unilocular adipose tissue — Stock Photo
    Unilocular adipose tissue
    Onion cells undergoing mitosis — Stock Photo
    Onion cells undergoing mitosis