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221 results

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    Transverse section through the midrib of a fern leaf — Stock Photo
    Transverse section through the midrib of a fern leaf
    Cholesterol plaque leading to atherosclerosis — Stock Photo
    Cholesterol plaque leading to atherosclerosis
    Full dog anatomy with skeleton and internal organs, digital illustration. — Stock Photo
    Full dog anatomy with skeleton and internal organs, digital illustration.
    Human brain anatomy — Stock Photo
    Human brain anatomy
    Brain's blood supply — Stock Photo
    Brain's blood supply
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    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.
    Male vascular system — Stock Photo
    Male vascular system
    View of Male vascular system — Stock Photo
    View of Male vascular system
    Illustration of heart in male body silhouette on white background. — Stock Photo
    Illustration of heart in male body silhouette on white background.
    Veins in transparent dog body, anatomical computer illustration. — Stock Photo
    Veins in transparent dog body, anatomical computer illustration.
    Illustration of heart in human body silhouette. — Stock Photo
    Illustration of heart in human body silhouette.
    Full dog musculature with internal organs, digital illustration. — Stock Photo
    Full dog musculature with internal organs, digital illustration.
    Male vascular system — Stock Photo
    Male vascular system
    Illustration of heart in human body silhouette. — Stock Photo
    Illustration of heart in human body silhouette.
    Female vascular system structure of legs, computer illustration. — Stock Photo
    Female vascular system structure of legs, computer illustration.
    Male vascular system — Stock Photo
    Male vascular system
    Illustration of glass heart on black background. — Stock Photo
    Illustration of glass heart on black background.
    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.
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration. — Stock Photo
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration.
    Medical illustration of human blood vessels of legs. — Stock Photo
    Medical illustration of human blood vessels of legs.
    Illustration of healthy and fatty heart on white background. — Stock Photo
    Illustration of healthy and fatty heart on white background.
    Arteries in transparent dog body, cropped, anatomical computer illustration. — Stock Photo
    Arteries in transparent dog body, cropped, anatomical computer illustration.
    Narrowed artery causing atherosclerosis — Stock Photo
    Narrowed artery causing atherosclerosis
    Veins in transparent dog body, anatomical computer illustration. — Stock Photo
    Veins in transparent dog body, anatomical computer illustration.
    Arteries in transparent dog body, anatomical computer illustration. — Stock Photo
    Arteries in transparent dog body, anatomical computer illustration.
    Full dog anatomy with internal organs, digital illustration. — Stock Photo
    Full dog anatomy with internal organs, digital illustration.
    Veins in transparent dog body, anatomical computer illustration. — Stock Photo
    Veins in transparent dog body, anatomical computer illustration.
    Illustration of inflamed heart in human body silhouette. — Stock Photo
    Illustration of inflamed heart in human body silhouette.
    Brain hemisphere anatomy — Stock Photo
    Brain hemisphere anatomy
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Illustration of heart in transparent male silhouette. — Stock Photo
    Illustration of heart in transparent male silhouette.
    Full dog anatomy with musculature and internal organs, digital illustration. — Stock Photo
    Full dog anatomy with musculature and internal organs, digital illustration.
    Illustration of heart in transparent male silhouette. — Stock Photo
    Illustration of heart in transparent male silhouette.
    Human brain with blood supply network — Stock Photo
    Human brain with blood supply network
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Full dog anatomy with internal organs and skeleton, digital illustration. — Stock Photo
    Full dog anatomy with internal organs and skeleton, digital illustration.
    Illustration of senior woman silhouette with colored heart on black background. — Stock Photo
    Illustration of senior woman silhouette with colored heart on black background.
    Arteries in transparent dog body, anatomical computer illustration. — Stock Photo
    Arteries in transparent dog body, anatomical computer illustration.
    Illustration of yellow heart on blue background. — Stock Photo
    Illustration of yellow heart on blue background.
    Illustration of senior woman blue silhouette with highlighted heart on black background. — Stock Photo
    Illustration of senior woman blue silhouette with highlighted heart on black background.
    Blood vessels of foot, computer illustration — Stock Photo
    Blood vessels of foot, computer illustration
    Illustration of transparent human heart silhouette. — Stock Photo
    Illustration of transparent human heart silhouette.
    Male vascular system — Stock Photo
    Male vascular system
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Arteries in transparent dog body, anatomical computer illustration. — Stock Photo
    Arteries in transparent dog body, anatomical computer illustration.
    Male vascular system — Stock Photo
    Male vascular system
    Full dog anatomy with internal organs, digital illustration. — Stock Photo
    Full dog anatomy with internal organs, digital illustration.
    Medical illustration of human blood vessels of head. — Stock Photo
    Medical illustration of human blood vessels of head.
    Anatomy of dog heart in transparent body, computer illustration. — Stock Photo
    Anatomy of dog heart in transparent body, computer illustration.
    Dog anatomy with internal organs, digital illustration. — Stock Photo
    Dog anatomy with internal organs, digital illustration.
    Full dog anatomy with musculature and internal organs, digital illustration. — Stock Photo
    Full dog anatomy with musculature and internal organs, digital illustration.
    Mid section illustration of heart in male body silhouette. — Stock Photo
    Mid section illustration of heart in male body silhouette.
    Blood vessels of foot, computer illustration — Stock Photo
    Blood vessels of foot, 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.
    Full dog musculature with internal organs, digital illustration. — Stock Photo
    Full dog musculature with internal organs, digital illustration.
    Medical illustration of human blood vessels of neck. — Stock Photo
    Medical illustration of human blood vessels of neck.
    Illustration of healthy heart in human body silhouette. — Stock Photo
    Illustration of healthy heart in human body silhouette.
    Atherosclerosis and narrowed artery — Stock Photo
    Atherosclerosis and narrowed artery
    View of Male vascular system — Stock Photo
    View of Male vascular system