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    Light micrograph (LM) of a section through sunflower(helianthus annuus) tissue showing spiral tracheids, a type of xylem. — Stock Photo
    Light micrograph (LM) of a section through sunflower(helianthus annuus) tissue showing spiral tracheids, a type of xylem.
    Human eye nerve, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human eye nerve, light micrograph. Haematoxylin and eosin stain.
    Dog roundworm eggs (Toxocara canis), light micrograph. — Stock Photo
    Dog roundworm eggs (Toxocara canis), light micrograph.
    Light micrograph of a cross section through a grape vine (Vitis sp.) stem. — Stock Photo
    Light micrograph of a cross section through a grape vine (Vitis sp.) stem.
    Nerve cells, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Nerve cells, light micrograph. Haematoxylin and eosin stain.
    Section through a peanut stem — Stock Photo
    Section through a peanut stem
    Smokers lungs, digital illustration and light micrograph on white background. — Stock Photo
    Smokers lungs, digital illustration and light micrograph on white background.
    Human compact bone tissue, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human compact bone tissue, light micrograph. Haematoxylin and eosin stain.
    Miliary tuberculosis disease in lungs, digital illustration and light micrograph. — Stock Photo
    Miliary tuberculosis disease in lungs, digital illustration and light micrograph.
    Male mosquito head — Stock Photo
    Male mosquito head
    Section of a muscular artery — Stock Photo
    Section of a muscular artery
    Kidney with acute nephritis — Stock Photo
    Kidney with acute nephritis
    Secondary carcinoma of the lung — Stock Photo
    Secondary carcinoma of the lung
    Section through the cerebellum in the brain — Stock Photo
    Section through the cerebellum in the brain
    Human head louse — Stock Photo
    Human head louse
    Lime tree stem — Stock Photo
    Lime tree stem
    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.
    Sciatic nerve showing a bundle of nerve fibres — Stock Photo
    Sciatic nerve showing a bundle of nerve fibres
    Gall bladder lining — Stock Photo
    Gall bladder lining
    Fallopian tube cellular structure — Stock Photo
    Fallopian tube cellular structure
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Complex mucosal folding of seminal vesicle — Stock Photo
    Complex mucosal folding of seminal vesicle
    Basal cell carcinoma — Stock Photo
    Basal cell carcinoma
    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).
    Lime tree stem — Stock Photo
    Lime tree stem
    Wall of a muscular artery — Stock Photo
    Wall of a muscular artery
    Lime tree stem — Stock Photo
    Lime tree stem
    Lung cancer, digital illustration and light micrograph of cancerous tissue. — Stock Photo
    Lung cancer, digital illustration and light micrograph of cancerous tissue.
    Young pine tree stem — Stock Photo
    Young pine tree stem
    Light micrograph of liver fluke eggs in a fish scale. — Stock Photo
    Light micrograph of liver fluke eggs in a fish scale.
    Human stomach adenocarcinoma, computer illustration and light micrograph. — Stock Photo
    Human stomach adenocarcinoma, computer illustration and light micrograph.
    Blood cells, light micrograph. — Stock Photo
    Blood cells, light micrograph.
    Nerve bundle from the sciatic nerve — Stock Photo
    Nerve bundle from the sciatic nerve
    Section of a flower bud — Stock Photo
    Section of a flower bud
    Breast with lobular carcinoma — Stock Photo
    Breast with lobular carcinoma
    Lung cancer, digital illustration and light micrograph of cancerous tissue. — Stock Photo
    Lung cancer, digital illustration and light micrograph of cancerous tissue.
    Lily flower anther — Stock Photo
    Lily flower anther
    Digital illustration and light micrograph of squamous cell carcinoma of lung. — Stock Photo
    Digital illustration and light micrograph of squamous cell carcinoma of lung.
    Parasitic trematode larva — Stock Photo
    Parasitic trematode larva
    Platelets in blood vessel — Stock Photo
    Platelets in blood vessel
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Villi of the intestine — Stock Photo
    Villi of the intestine
    Adenocarcinoma of the endometrium — Stock Photo
    Adenocarcinoma of the endometrium
    Mid rib of an olive leaf — Stock Photo
    Mid rib of an olive leaf
    Fertilization of human egg — Stock Photo
    Fertilization of human egg
    Section through a lily stem — Stock Photo
    Section through a lily stem
    Transverse section through the midrib of a fern leaf — Stock Photo
    Transverse section through the midrib of a fern leaf
    Transverse section through the midrib of a fern leaf — Stock Photo
    Transverse section through the midrib of a fern leaf
    Section through a growing bone — Stock Photo
    Section through a growing bone
    Liver fluke Clonorchis sinensis — Stock Photo
    Liver fluke Clonorchis sinensis
    Microsporum gypseum fungus — Stock Photo
    Microsporum gypseum fungus
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree. — Stock Photo
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree.
    Odontoblasts and the dental pulp — Stock Photo
    Odontoblasts and the dental pulp
    Section through a thyroid gland — Stock Photo
    Section through a thyroid gland
    Light micrograph of a colon biopsy from a colonoscopy. The pathology report describes normal colonic mucosa fragment with colic glands. Haematoxylin and eosin stain. — Stock Photo
    Light micrograph of a colon biopsy from a colonoscopy. The pathology report describes normal colonic mucosa fragment with colic glands. Haematoxylin and eosin stain.
    Light micrograph of a section through the surface of a tonsil showing the stratified squamous epithelium (pink) and underlying lymphoid tissue. — Stock Photo
    Light micrograph of a section through the surface of a tonsil showing the stratified squamous epithelium (pink) and underlying lymphoid tissue.
    Light micrograph of a longitudinal section through a male pine cone showing the pollen (yellow). — Stock Photo
    Light micrograph of a longitudinal section through a male pine cone showing the pollen (yellow).
    Trachea lined with ciliated columnar epithelium — Stock Photo
    Trachea lined with ciliated columnar epithelium
    Section of a flower bud — Stock Photo
    Section of a flower bud
    Kidney with acute nephritis — Stock Photo
    Kidney with acute nephritis