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    Flu virus particle structure — Stock Photo
    Flu virus particle structure
    Illustration of 4 cell stage egg on black background. — Stock Photo
    Illustration of 4 cell stage egg on black background.
    Activated human macrophage — Stock Photo
    Activated human macrophage
    Basal cell carcinoma — Stock Photo
    Basal cell carcinoma
    Female teacher and girl student conducting scientific experiment at microscope in laboratory — Stock Photo
    Female teacher and girl student conducting scientific experiment at microscope in laboratory
    Fossilised fragment of a coccolithotrope skeleton — Stock Photo
    Fossilised fragment of a coccolithotrope skeleton
    Escherichia coli bacteria on gecko tongue — Stock Photo
    Escherichia coli bacteria on gecko tongue
    Illustration of a 8 cell stage egg on black background. — Stock Photo
    Illustration of a 8 cell stage egg on black background.
    Red cancer cells, digital illustration. — Stock Photo
    Red cancer cells, digital illustration.
    Tendon, coloured scanning electron micrograph (SEM), showing bundles of collagen fibres. The parallel alignment of the fibres make tendons inelastic but flexible. Tendons attach muscle to bone — Stock Photo
    Tendon, coloured scanning electron micrograph (SEM), showing bundles of collagen fibres. The parallel alignment of the fibres make tendons inelastic but flexible. Tendons attach muscle to bone
    Digital artwork of illuminated red human cancer cell. — Stock Photo
    Digital artwork of illuminated red human cancer cell.
    Epithelium of a foliate papillae of the tongue — Stock Photo
    Epithelium of a foliate papillae of the tongue
    Radiolarians amoeboid protozoa — Stock Photo
    Radiolarians amoeboid protozoa
    Secondary follicles in an ovary — Stock Photo
    Secondary follicles in an ovary
    Colored digital illustration of red cancer cells. — Stock Photo
    Colored digital illustration of red cancer cells.
    Nerve bundle from the sciatic nerve — Stock Photo
    Nerve bundle from the sciatic nerve
    Triceratium sp. diatom algae — Stock Photo
    Triceratium sp. diatom algae
    Giant cell tumour of the bone — Stock Photo
    Giant cell tumour of the bone
    Common house dust mite — Stock Photo
    Common house dust mite
    Male sex cell — Stock Photo
    Male sex cell
    Asparagus pollen grains — Stock Photo
    Asparagus pollen grains
    Puffball fungus spore — Stock Photo
    Puffball fungus spore
    Boy looking through a microscope at autumn leaves, California, United States — Stock Photo
    Boy looking through a microscope at autumn leaves, California, United States
    Focused boy students using digital tablet at microscope in laboratory classroom — Stock Photo
    Focused boy students using digital tablet at microscope in laboratory classroom
    Lymphoma cancer cell — Stock Photo
    Lymphoma cancer cell
    Colored digital illustration of green cancer cells. — Stock Photo
    Colored digital illustration of green cancer cells.
    Common house dust mite — Stock Photo
    Common house dust mite
    Male teacher and smiling girl student conducting scientific experiment at microscope in laboratory classroom — Stock Photo
    Male teacher and smiling girl student conducting scientific experiment at microscope in laboratory classroom
    Closeup side view of magnified brown fly with large red eyes and transparent wing — Stock Photo
    Closeup side view of magnified brown fly with large red eyes and transparent wing
    Adenocarcinoma of the endometrium — Stock Photo
    Adenocarcinoma of the endometrium
    Ruptured venule running through fatty tissue — Stock Photo
    Ruptured venule running through fatty tissue
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Illustration of unfertilized human egg cell. — Stock Photo
    Illustration of unfertilized human egg cell.
    Digital illustration of female reproductive system and Chlamydia trachomatis bacteria causing Chlamydial infection. — Stock Photo
    Digital illustration of female reproductive system and Chlamydia trachomatis bacteria causing Chlamydial infection.
    Transparent cells on white background, digital illustration. — Stock Photo
    Transparent cells on white background, digital illustration.
    Red blood cells, digital illustration. — Stock Photo
    Red blood cells, digital illustration.
    Human blood cells — Stock Photo
    Human blood cells
    Fractured flexor tendon — Stock Photo
    Fractured flexor tendon
    Girl students using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl students using microscope, conducting scientific experiment in laboratory classroom
    Human sperm cell, coloured scanning electron micrograph (SEM). — Stock Photo
    Human sperm cell, coloured scanning electron micrograph (SEM).
    Rutilaria epsilon diatom — Stock Photo
    Rutilaria epsilon diatom
    Chlamydia trachomatis bacteria cells, digital illustration. — Stock Photo
    Chlamydia trachomatis bacteria cells, digital illustration.
    Closeup extreme magnified fly of orange and purple color with antennae — Stock Photo
    Closeup extreme magnified fly of orange and purple color with antennae
    Focused boy student using microscope in classroom — Stock Photo
    Focused boy student using microscope in classroom
    Digital illustration of green cancer cells. — Stock Photo
    Digital illustration of green cancer cells.
    Possible global pandemic. Vaccine study for the Coronavirus virus. — Stock Photo
    Possible global pandemic. Vaccine study for the Coronavirus virus.
    Digital illustration of red cancer cells, full frame. — Stock Photo
    Digital illustration of red cancer cells, full frame.
    Radiolarians amoeboid protozoa — Stock Photo
    Radiolarians amoeboid protozoa
    Bluebottle fly head — Stock Photo
    Bluebottle fly head
    Male sex cell — Stock Photo
    Male sex cell
    Seminiferous tubules and lending cells — Stock Photo
    Seminiferous tubules and lending cells
    Blue cells on black background, digital illustration. — Stock Photo
    Blue cells on black background, digital illustration.
    Duct lined with pseudostratified epithelium — Stock Photo
    Duct lined with pseudostratified epithelium
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake — Stock Photo
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells — Stock Photo
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells
    Osteosarcoma cancer cell — Stock Photo
    Osteosarcoma cancer cell
    Red blood cells and platelets — Stock Photo
    Red blood cells and platelets
    House dust mites — Stock Photo
    House dust mites
    Italy, Cicada on tree — Stock Photo
    Italy, Cicada on tree
    Arachnoidiscus sp. diatom algae — Stock Photo
    Arachnoidiscus sp. diatom algae