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    Squamous carcinoma of the skin — Stock Photo
    Squamous carcinoma of the skin
    Iris stem cellular structure — Stock Photo
    Iris stem cellular structure
    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.
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes. — Stock Photo
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes.
    Covid-19 coronavirus particle, computer illustration — Stock Photo
    Covid-19 coronavirus particle, computer illustration
    Woman hand peeling ripe sweet tangerine — Stock Photo
    Woman hand peeling ripe sweet tangerine
    Digital illustration and light micrograph of squamous cell carcinoma of lung. — Stock Photo
    Digital illustration and light micrograph of squamous cell carcinoma of lung.
    Tumour affecting the pituitary gland — Stock Photo
    Tumour affecting the pituitary gland
    Illustration showing structure of influenza flu virus. — Stock Photo
    Illustration showing structure of influenza flu virus.
    Broom stem. Light micrograph (LM) of transverse section through stem of common broom (Salicornia europaea) plant. Broom is drought plant (xerophyte) with ribbed stems and branches to increase area for photosynthesis — Stock Photo
    Broom stem. Light micrograph (LM) of transverse section through stem of common broom (Salicornia europaea) plant. Broom is drought plant (xerophyte) with ribbed stems and branches to increase area for photosynthesis
    Section through a wart — Stock Photo
    Section through a wart
    Sago palm leaf — Stock Photo
    Sago palm leaf
    Lung bronchiole. Light micrograph of a section through lung tissue and a bronchiole. Bronchi form branches from the trachea and gradually diminish in diameter with increasing branching into bronchioles within the lung — Stock Photo
    Lung bronchiole. Light micrograph of a section through lung tissue and a bronchiole. Bronchi form branches from the trachea and gradually diminish in diameter with increasing branching into bronchioles within the lung
    Gum tissue with gingivitis — Stock Photo
    Gum tissue with gingivitis
    Skeletal muscle fibres — Stock Photo
    Skeletal muscle fibres
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Mid rib of an olive leaf — Stock Photo
    Mid rib of an olive leaf
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with from primary biliary cirrhosis. Cirrhosis is a disease in which bands of fibrosis (internal scarring) break up the internal structure of the liver — Stock Photo
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with from primary biliary cirrhosis. Cirrhosis is a disease in which bands of fibrosis (internal scarring) break up the internal structure of the liver
    Lung bronchiole. Light micrograph of a section through lung tissue and a bronchiole. Bronchi form branches from the trachea and gradually diminish in diameter with increasing branching into bronchioles within the lung — Stock Photo
    Lung bronchiole. Light micrograph of a section through lung tissue and a bronchiole. Bronchi form branches from the trachea and gradually diminish in diameter with increasing branching into bronchioles within the lung
    Adenocarcinoma of the sigmoid colon — Stock Photo
    Adenocarcinoma of the sigmoid colon
    Woman hand peeling ripe sweet tangerine — Stock Photo
    Woman hand peeling ripe sweet tangerine
    Bone marrow cellular structure — Stock Photo
    Bone marrow cellular structure
    Unground and ground Fenugreek seeds with spoon in sectioned wooden dish — Stock Photo
    Unground and ground Fenugreek seeds with spoon in sectioned wooden dish
    Peripheral nerve. Black and white transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin (dark rings) is an insulating fatty layer that surrounds the myelinated nerve fibres — Stock Photo
    Peripheral nerve. Black and white transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin (dark rings) is an insulating fatty layer that surrounds the myelinated nerve fibres
    Basal cell carcinoma — Stock Photo
    Basal cell carcinoma
    Young pine tree stem — Stock Photo
    Young pine tree stem
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Bile duct cellular sctructure — Stock Photo
    Bile duct cellular sctructure
    Healthy human brain — Stock Photo
    Healthy human brain
    Normal head and brain, MRI scan — Stock Photo
    Normal head and brain, MRI scan
    Cross-section through a fallopian tube — Stock Photo
    Cross-section through a fallopian tube
    Parasitic tick feeding — Stock Photo
    Parasitic tick feeding
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Light micrograph of a longitudinal section through a healthy arteriole. — Stock Photo
    Light micrograph of a longitudinal section through a healthy arteriole.
    Petrified wood pattern, full frame. — Stock Photo
    Petrified wood pattern, full frame.
    Normal human brain — Stock Photo
    Normal human brain
    Normal human renal artery — Stock Photo
    Normal human renal artery
    Light micrograph of a section through skin with a neurofibroma tumour (pink, across bottom). — Stock Photo
    Light micrograph of a section through skin with a neurofibroma tumour (pink, across bottom).
    Epithelium of a foliate papillae of the tongue — Stock Photo
    Epithelium of a foliate papillae of the tongue
    Myelinated nerve fibres — Stock Photo
    Myelinated nerve fibres
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with from primary biliary cirrhosis. Cirrhosis is a disease in which bands of fibrosis (internal scarring) break up the internal structure of the liver — Stock Photo
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with from primary biliary cirrhosis. Cirrhosis is a disease in which bands of fibrosis (internal scarring) break up the internal structure of the liver
    Lung tissue, coloured transmission electron micrograph (TEM). — Stock Photo
    Lung tissue, coloured transmission electron micrograph (TEM).
    Coloured computed tomography (CT) scan of a section through the chest of a 76-year-old male patient with a malignant (cancerous) tumour (bright, right) of the bronchus. — Stock Photo
    Coloured computed tomography (CT) scan of a section through the chest of a 76-year-old male patient with a malignant (cancerous) tumour (bright, right) of the bronchus.
    Lime tree stem — Stock Photo
    Lime tree stem
    Hyaline cartilage, a semi-rigid connective tissue — Stock Photo
    Hyaline cartilage, a semi-rigid connective tissue
    Light micrograph of a section through the eye of a frog. — Stock Photo
    Light micrograph of a section through the eye of a frog.
    Coloured scanning electron micrograph of human cancellous spongy bone tissue. — Stock Photo
    Coloured scanning electron micrograph of human cancellous spongy bone tissue.
    Covid-19 coronavirus particle, computer illustration — Stock Photo
    Covid-19 coronavirus particle, computer illustration
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Total hip replacement, X-ray — Stock Photo
    Total hip replacement, X-ray
    Tendon, coloured scanning electron micrograph showing bundles of collagen fibres. — Stock Photo
    Tendon, coloured scanning electron micrograph showing bundles of collagen fibres.
    Epidermoid carcinoma skin cancer — Stock Photo
    Epidermoid carcinoma skin cancer
    Prostate tissue showing Iadenocarcinoma — Stock Photo
    Prostate tissue showing Iadenocarcinoma
    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.
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (grey) and large intercellular air spaces (holes). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (grey) and large intercellular air spaces (holes).
    Skeletal muscle fibres — Stock Photo
    Skeletal muscle fibres
    Section through the olfactory epithelium — Stock Photo
    Section through the olfactory epithelium
    Gall bladder lining — Stock Photo
    Gall bladder lining