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    Realistic human heart model on black background, computer illustration. — Stock Photo
    Realistic human heart model on black background, computer illustration.
    Bacteria amidst blood cells in blood vessel, digital illustration. — Stock Photo
    Bacteria amidst blood cells in blood vessel, digital illustration.
    Realistic human heart and blood vessels on black background, digital illustration. — Stock Photo
    Realistic human heart and blood vessels on black background, digital illustration.
    Transverse section through the midrib of a fern leaf — Stock Photo
    Transverse section through the midrib of a fern leaf
    Blood supply network of human head — Stock Photo
    Blood supply network of human head
    Illustration of senior woman silhouette showing heart on black background. — Stock Photo
    Illustration of senior woman silhouette showing heart on black background.
    Male abdominal blood vessels, digital illustration. — Stock Photo
    Male abdominal blood vessels, digital illustration.
    Female silhouette showing heart anatomy, computer illustration. — Stock Photo
    Female silhouette showing heart anatomy, computer illustration.
    Cardiovascular system in female body, digital illustration. — Stock Photo
    Cardiovascular system in female body, digital illustration.
    Lymphatic system of male upper body, computer illustration. — Stock Photo
    Lymphatic system of male upper body, computer illustration.
    Male abdominal blood vessels, digital illustration. — Stock Photo
    Male abdominal blood vessels, digital illustration.
    Vascular system with major veins and arteries — Stock Photo
    Vascular system with major veins and arteries
    Kidney with acute nephritis — Stock Photo
    Kidney with acute nephritis
    Vascular system in male body, computer illustration. — Stock Photo
    Vascular system in male body, computer illustration.
    Chest, neck and head arteries — Stock Photo
    Chest, neck and head arteries
    Atherosclerosis and narrowed artery — Stock Photo
    Atherosclerosis and narrowed artery
    Blood vessels of human head and neck, digital illustration. — Stock Photo
    Blood vessels of human head and neck, digital illustration.
    Veins in transparent dog body, anatomical computer illustration. — Stock Photo
    Veins in transparent dog body, anatomical computer illustration.
    Full dog musculature with internal organs, digital illustration. — Stock Photo
    Full dog musculature with internal organs, digital illustration.
    Anatomy of neck of woman, digital illustration. — Stock Photo
    Anatomy of neck of woman, digital illustration.
    Male anatomy showing vascular system, computer illustration. — Stock Photo
    Male anatomy showing vascular system, computer illustration.
    Atherosclerosis and narrowed artery — Stock Photo
    Atherosclerosis and narrowed artery
    Fat in blood cells blocking blood vessel, digital illustration. — Stock Photo
    Fat in blood cells blocking blood vessel, digital illustration.
    Heart anatomy in male thorax, computer illustration. — Stock Photo
    Heart anatomy in male thorax, computer illustration.
    Veins in transparent dog body, anatomical computer illustration. — Stock Photo
    Veins in transparent dog body, anatomical computer illustration.
    Narrowed blood vessel, computer illustration. — Stock Photo
    Narrowed blood vessel, computer illustration.
    Digital illustration of senior man anatomy showing heart. — Stock Photo
    Digital illustration of senior man anatomy showing heart.
    Anatomy of throat of woman, digital illustration. — Stock Photo
    Anatomy of throat of woman, digital illustration.
    Vascular system in normal female body, digital illustration — Stock Photo
    Vascular system in normal female body, digital illustration
    Illustration of fat inside of human artery. — Stock Photo
    Illustration of fat inside of human artery.
    Human bronchi and heart, illustration — Stock Photo
    Human bronchi and heart, illustration
    Illustration of stent inside of human artery. — Stock Photo
    Illustration of stent inside of human artery.
    Male upper body anatomy and blood vessels, computer illustration. — Stock Photo
    Male upper body anatomy and blood vessels, computer illustration.
    Male back anatomy and skeletal system, computer illustration. — Stock Photo
    Male back anatomy and skeletal system, computer illustration.
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    3d illustration of constricted and narrowed artery while arteriosclerosis. — Stock Photo
    3d illustration of constricted and narrowed artery while arteriosclerosis.
    Cardiovascular system in normal male body, computer illustration. — Stock Photo
    Cardiovascular system in normal male body, computer illustration.
    Male head and neck anatomy, digital illustration. — Stock Photo
    Male head and neck anatomy, digital illustration.
    Red blood cells — Stock Photo
    Red blood cells
    Macrophage foam cells with lipid droplets, digital illustration. — Stock Photo
    Macrophage foam cells with lipid droplets, digital illustration.
    Medical illustration of fat inside of human artery. — Stock Photo
    Medical illustration of fat inside of human artery.
    Human heart with colored superior vena cava, computer illustration. — Stock Photo
    Human heart with colored superior vena cava, computer illustration.
    Digital illustration of senior man anatomy showing heart. — Stock Photo
    Digital illustration of senior man anatomy showing heart.
    Stent and balloon catheter for implantation into blood vessel, digital illustration. — Stock Photo
    Stent and balloon catheter for implantation into blood vessel, digital illustration.
    Blood vessels of the head, computer illustration — Stock Photo
    Blood vessels of the head, computer illustration
    3d rendered illustration of colored female heart in body silhouette. — Stock Photo
    3d rendered illustration of colored female heart in body silhouette.
    3d illustration of three metal stents for implantation into blood vessels. — Stock Photo
    3d illustration of three metal stents for implantation into blood vessels.
    Macrophage foam cell with lipid droplets, digital illustration. — Stock Photo
    Macrophage foam cell with lipid droplets, digital illustration.
    Male abdominal organs, midsection, digital illustration. — Stock Photo
    Male abdominal organs, midsection, digital illustration.
    3d rendered illustration of male cyclist anatomy on black background. — Stock Photo
    3d rendered illustration of male cyclist anatomy on black background.
    Illustration on black of silhouette of obese woman with highlighted heart. — Stock Photo
    Illustration on black of silhouette of obese woman with highlighted heart.
    Thorax anatomy, computer illustration — Stock Photo
    Thorax anatomy, computer illustration
    Structure of dog vascular system with colorful blood vessels in transparent body, cropped, computer illustration. — Stock Photo
    Structure of dog vascular system with colorful blood vessels in transparent body, cropped, computer illustration.
    Coronary veins, computer illustration. — Stock Photo
    Coronary veins, computer illustration.
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red).
    Female silhouette showing heart anatomy, computer illustration. — Stock Photo
    Female silhouette showing heart anatomy, computer illustration.
    Medical illustration of fat inside of human artery. — Stock Photo
    Medical illustration of fat inside of human artery.
    Realistic human heart and blood vessels on black background, digital illustration. — Stock Photo
    Realistic human heart and blood vessels on black background, digital illustration.
    Lily stem. Light micrograph(LM) of section through part of lily (Lilium) stem. Thin outer epidermis surrounds layer of cortex. At center is pith, which contains numerous vascular bundles (yellow) — Stock Photo
    Lily stem. Light micrograph(LM) of section through part of lily (Lilium) stem. Thin outer epidermis surrounds layer of cortex. At center is pith, which contains numerous vascular bundles (yellow)
    Structure of dog vascular system with colorful blood vessels in transparent body, computer illustration. — Stock Photo
    Structure of dog vascular system with colorful blood vessels in transparent body, computer illustration.