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    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Digital illustration of senior man anatomy showing heart. — Stock Photo
    Digital illustration of senior man anatomy showing heart.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Illustration of silhouette of obese man with visible heart. — Stock Photo
    Illustration of silhouette of obese man with visible heart.
    Transparent female body with visible lymphatic system, digital illustration. — Stock Photo
    Transparent female body with visible lymphatic system, digital illustration.
    Anatomical male body showing skeleton and lymphatic system, digital illustration. — Stock Photo
    Anatomical male body showing skeleton and lymphatic system, digital illustration.
    Atherosclerosis and narrowed artery — Stock Photo
    Atherosclerosis and narrowed artery
    Male body silhouette showing heart anatomy, computer illustration. — Stock Photo
    Male body silhouette showing heart anatomy, computer illustration.
    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.
    Female anatomy showing vascular system, digital illustration. — Stock Photo
    Female anatomy showing vascular system, digital illustration.
    Illustration of silhouette of obese man with visible heart. — Stock Photo
    Illustration of silhouette of obese man with visible heart.
    Light micrograph of Dicot plants stem showing plant vascular tissue. — Stock Photo
    Light micrograph of Dicot plants stem showing plant vascular tissue.
    Female upper body lymphatic system, computer illustration. — Stock Photo
    Female upper body lymphatic system, computer illustration.
    Cross-section of human artery — Stock Photo
    Cross-section of human artery
    Male head and neck anatomy, digital illustration. — Stock Photo
    Male head and neck anatomy, digital illustration.
    Patient with a heart pacemaker — Stock Photo
    Patient with a heart pacemaker
    Digital anatomical illustration of arteries and veins in body of senior man. — Stock Photo
    Digital anatomical illustration of arteries and veins in body of senior man.
    Vascular system of a child — Stock Photo
    Vascular system of a child
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Transparent female body with visible lymphatic system, digital illustration. — Stock Photo
    Transparent female body with visible lymphatic system, digital illustration.
    Illustration of heart in human body silhouette. — Stock Photo
    Illustration of heart in human body silhouette.
    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.
    Human brain anatomy — Stock Photo
    Human brain anatomy
    Vascular system in normal female body, digital illustration — Stock Photo
    Vascular system in normal female body, digital illustration
    Male head and neck anatomy, digital illustration. — Stock Photo
    Male head and neck anatomy, digital illustration.
    Male upper body anatomy and internal organs, computer illustration. — Stock Photo
    Male upper body anatomy and internal organs, computer illustration.
    Female anatomy showing heart in transparent body silhouette, computer illustration. — Stock Photo
    Female anatomy showing heart in transparent body silhouette, computer illustration.
    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).
    Digital illustration of senior man anatomy showing heart. — Stock Photo
    Digital illustration of senior man anatomy showing heart.
    Healthy female vascular system, computer illustration — Stock Photo
    Healthy female vascular system, computer illustration
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (blue) and large intercellular air spaces (holes). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (blue) and large intercellular air spaces (holes).
    Human heart model on blue background, computer illustration. — Stock Photo
    Human heart model on blue background, computer illustration.
    Grey human heart model on white background, computer illustration. — Stock Photo
    Grey human heart model on white background, computer illustration.
    Illustration of red human blood cells on black background. — Stock Photo
    Illustration of red human blood cells on black background.
    Human body model showing male anatomy, digital illustration. — Stock Photo
    Human body model showing male anatomy, digital illustration.
    Wall of a muscular artery — Stock Photo
    Wall of a muscular artery
    Human bronchi and heart, illustration — Stock Photo
    Human bronchi and heart, illustration
    Digital illustration of senior man anatomy showing heart. — Stock Photo
    Digital illustration of senior man anatomy showing heart.
    Wild fresh green and wilted orange huge leaves on stems of lush ferns in dense forest during autumn — Stock Photo
    Wild fresh green and wilted orange huge leaves on stems of lush ferns in dense forest during autumn
    Vascular system of female upper body, computer illustration. — Stock Photo
    Vascular system of female upper body, computer illustration.
    Skeletal and cardiovascular systems — Stock Photo
    Skeletal and cardiovascular systems
    Digital illustration of senior man anatomy showing heart tumour. — Stock Photo
    Digital illustration of senior man anatomy showing heart tumour.
    Coronary blood vessels in blue human heart model, digital illustration. — Stock Photo
    Coronary blood vessels in blue human heart model, digital illustration.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Illustration of human silhouette with inflamed heart. — Stock Photo
    Illustration of human silhouette with inflamed heart.
    Narrowed artery causing atherosclerosis — Stock Photo
    Narrowed artery causing atherosclerosis
    Coronary angioplasty stent insertion — Stock Photo
    Coronary angioplasty stent insertion
    Male shoulder anatomy, digital illustration. — Stock Photo
    Male shoulder anatomy, digital illustration.
    Male back anatomy and skeletal system, computer illustration. — Stock Photo
    Male back anatomy and skeletal system, computer illustration.
    Illustration of female silhouette with inflamed heart. — Stock Photo
    Illustration of female silhouette with inflamed heart.
    Female anatomical body with visible lymphatic system, computer illustration. — Stock Photo
    Female anatomical body with visible lymphatic system, computer illustration.
    Transparent female body with visible lymphatic system, digital illustration. — Stock Photo
    Transparent female body with visible lymphatic system, digital illustration.
    Medical illustration of blocked artery disorder. — Stock Photo
    Medical illustration of blocked artery disorder.
    Bacteria amidst blood cells in blood vessel, digital illustration. — Stock Photo
    Bacteria amidst blood cells in blood vessel, digital illustration.
    Digital illustration of senior man anatomy showing heart. — Stock Photo
    Digital illustration of senior man anatomy showing heart.
    Digital illustration of senior man anatomy showing heart. — Stock Photo
    Digital illustration of senior man anatomy showing heart.
    Illustration of transparent blue silhouette of male body with colored heart tumour. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored heart tumour.
    Male upper body anatomy and internal organs, computer illustration. — Stock Photo
    Male upper body anatomy and internal organs, computer illustration.
    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.
    Illustration of stent inside of human fatty artery. — Stock Photo
    Illustration of stent inside of human fatty artery.