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    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant — Stock Photo
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant
    Transverse section through a leaf showing foveate stomata (light areas on underside of leaf. — Stock Photo
    Transverse section through a leaf showing foveate stomata (light areas on underside of leaf.
    Colored large intestine in female body silhouette, digital illustration. — Stock Photo
    Colored large intestine in female body silhouette, digital illustration.
    Villi of the intestine — Stock Photo
    Villi of the intestine
    Colon cancer in male body, conceptual computer illustration. — Stock Photo
    Colon cancer in male body, conceptual computer illustration.
    Female anatomy with orange colored large intestine, digital illustration. — Stock Photo
    Female anatomy with orange colored large intestine, digital illustration.
    Antibodies attacking neurons. Conceptual computer illustration of autoimmune neurologic diseases — Stock Photo
    Antibodies attacking neurons. Conceptual computer illustration of autoimmune neurologic diseases
    Human skeleton with transectional view of skull — Stock Photo
    Human skeleton with transectional view of skull
    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.
    Colon cancer in female body, conceptual computer illustration. — Stock Photo
    Colon cancer in female body, conceptual computer illustration.
    Section through the cerebellum in the brain — Stock Photo
    Section through the cerebellum in the brain
    Anatomy of human salivary glands — Stock Photo
    Anatomy of human salivary glands
    Male anatomy showing Nasalis transverse muscle, computer illustration. — Stock Photo
    Male anatomy showing Nasalis transverse muscle, computer illustration.
    Illustration of colon in transparent male silhouette. — Stock Photo
    Illustration of colon in transparent male silhouette.
    Cilia covering the epithelial lining of the nasopharyx — Stock Photo
    Cilia covering the epithelial lining of the nasopharyx
    Transparent human body showing heart and main circulatory system with internal organs, nervous, lymphatic and circulatory systems — Stock Photo
    Transparent human body showing heart and main circulatory system with internal organs, nervous, lymphatic and circulatory systems
    Antibodies attacking neurons. Conceptual computer illustration of autoimmune neurologic diseases — Stock Photo
    Antibodies attacking neurons. Conceptual computer illustration of autoimmune neurologic diseases
    Large intestine, computer illustration — Stock Photo
    Large intestine, computer illustration
    Woody stem section. Coloured scanning electron micrograph (SEM) of a transverse section through the stem of a woody plant. The majority of tissue seen here is secondary xylem (dark brown) — Stock Photo
    Woody stem section. Coloured scanning electron micrograph (SEM) of a transverse section through the stem of a woody plant. The majority of tissue seen here is secondary xylem (dark brown)
    Mid section illustration of colon in male body silhouette. — Stock Photo
    Mid section illustration of colon in male body silhouette.
    Marsh marigold carpel — Stock Photo
    Marsh marigold carpel
    Anatomy of adrenal gland on white background — Stock Photo
    Anatomy of adrenal gland on white background
    Illustration of colon cancer in male body silhouette on black background. — Stock Photo
    Illustration of colon cancer in male body silhouette on black background.
    Maize root. Light micrograph (LM) of section through root of maize plant (Zea mays) showing typical monocot arrangement of vascular bundles. central vascular cylinder is comprised of central cluster of parenchyma cells — Stock Photo
    Maize root. Light micrograph (LM) of section through root of maize plant (Zea mays) showing typical monocot arrangement of vascular bundles. central vascular cylinder is comprised of central cluster of parenchyma cells
    Female anatomy with orange colored large intestine, digital illustration. — Stock Photo
    Female anatomy with orange colored large intestine, digital illustration.
    Cells undergoing mitosis — Stock Photo
    Cells undergoing mitosis
    Illustration of silhouette of obese man with visible colon. — Stock Photo
    Illustration of silhouette of obese man with visible colon.
    Anatomy of human abdominal vein system — Stock Photo
    Anatomy of human abdominal vein system
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant — Stock Photo
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant
    Human Colon, computer illustration — Stock Photo
    Human Colon, computer illustration
    Medical illustration of the large and small intestines — Stock Photo
    Medical illustration of the large and small intestines
    Coloured transmission electron micrograph (TEM) of a transverse section through an artery. — Stock Photo
    Coloured transmission electron micrograph (TEM) of a transverse section through an artery.
    Medical illustration of human digestive system — Stock Photo
    Medical illustration of human digestive system
    Sago palm leaf — Stock Photo
    Sago palm leaf
    Colored large intestine in female body silhouette, digital illustration. — Stock Photo
    Colored large intestine in female body silhouette, digital illustration.
    Male anatomy showing Nasalis transverse muscle, computer illustration. — Stock Photo
    Male anatomy showing Nasalis transverse muscle, computer illustration.
    Medical illustration of human digestive system with labels — Stock Photo
    Medical illustration of human digestive system with labels
    Antibodies attacking neurons. Conceptual computer illustration of autoimmune neurologic diseases — Stock Photo
    Antibodies attacking neurons. Conceptual computer illustration of autoimmune neurologic diseases
    Thyroid gland showing the follicles — Stock Photo
    Thyroid gland showing the follicles
    Male anatomy with orange colored large intestine, digital illustration. — Stock Photo
    Male anatomy with orange colored large intestine, digital illustration.
    Close-up view of beautiful Transverse spot jade bird perching on twig in wildlife, selective focus — Stock Photo
    Close-up view of beautiful Transverse spot jade bird perching on twig in wildlife, selective focus
    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.
    Illustration of blue silhouette of obese woman with highlighted colon. — Stock Photo
    Illustration of blue silhouette of obese woman with highlighted colon.
    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
    Wall of a muscular artery — Stock Photo
    Wall of a muscular artery
    Tendon showing the parallel collagen fibres — Stock Photo
    Tendon showing the parallel collagen fibres
    Illustration of cancerous tumour in female rectum. — Stock Photo
    Illustration of cancerous tumour in female rectum.
    Cardiac muscle from a healthy heart — Stock Photo
    Cardiac muscle from a healthy heart
    Bowel cancer in female body, conceptual computer illustration. — Stock Photo
    Bowel cancer in female body, conceptual computer illustration.
    Human skeleton with red colored Nasalis transverse muscle, digital illustration. — Stock Photo
    Human skeleton with red colored Nasalis transverse muscle, digital illustration.
    Male anatomy showing Nasalis transverse muscle, computer illustration. — Stock Photo
    Male anatomy showing Nasalis transverse muscle, computer illustration.
    Bowel cancer in female body, conceptual computer illustration. — Stock Photo
    Bowel cancer in female body, conceptual computer illustration.
    Illustration of female silhouette with highlighted intestines cancer. — Stock Photo
    Illustration of female silhouette with highlighted intestines cancer.
    Hair follicles of human skin — Stock Photo
    Hair follicles of human skin
    Colored large intestine in female body silhouette, digital illustration. — Stock Photo
    Colored large intestine in female body silhouette, digital illustration.
    Male anatomy with orange colored large intestine, digital illustration. — Stock Photo
    Male anatomy with orange colored large intestine, digital illustration.
    Illustration of diverticulitis in the descending colon of the human intestine — Stock Photo
    Illustration of diverticulitis in the descending colon of the human intestine
    Tendon showing the parallel collagen fibres — Stock Photo
    Tendon showing the parallel collagen fibres
    Illustration of senior woman with colon tumour on black background. — Stock Photo
    Illustration of senior woman with colon tumour on black background.
    Colon cancer in female body, conceptual computer illustration. — Stock Photo
    Colon cancer in female body, conceptual computer illustration.