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Gastroesophageal Reflux Disease or GERD
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TheVisualMD
Gastroesophageal Reflux Disease or GERD
Stopcock Closed Positions
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INTELECOM
Stopcock Closed Positions
Stopcock
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INTELECOM
Stopcock
Adjusting a Burner
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INTELECOM
Adjusting a Burner
Lighting a Burner
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INTELECOM
Lighting a Burner
Releasing Liquid with a 3-Way Bulb
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INTELECOM
Releasing Liquid with a 3-Way Bulb
Filling a Pipet with a 3-Way Bulb
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INTELECOM
Filling a Pipet with a 3-Way Bulb
Liquefaction of Carbon Dioxide - Part 2 of 4
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INTELECOM
Liquefaction of Carbon Dioxide - Part 2 of 4
Controlling the Flow Rate of Drops
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INTELECOM
Controlling the Flow Rate of Drops
Human Heart, Illustration
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Spencer Sutton
Human Heart, Illustration
Human Heart, Illustration
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Spencer Sutton
Human Heart, Illustration
Lymphatic vessel, LM
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Alvin Telser
Lymphatic vessel, LM
One-way Valve in Lymphatic Vessel, LM
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Science Stock Photography
One-way Valve in Lymphatic Vessel, LM
Artificial Heart Valves, X-Ray
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Scott Camazine
Artificial Heart Valves, X-Ray
Artificial Heart Vallves, X-Ray
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Scott Camazine
Artificial Heart Vallves, X-Ray
Heart
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Phil Degginger
Heart
Bath House Water Valves
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David R. Frazier Photolibrary, Inc.
Bath House Water Valves
Flood Control Gates
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David R. Frazier
Flood Control Gates
Diatoms
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M. I. Walker
Diatoms
Diatoms
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Kent Wood
Diatoms
CT Transverse Plane of Heart and Left Ventricle
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Scott Dixon
CT Transverse Plane of Heart and Left Ventricle
Using a 3-Way Bulb
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INTELECOM
Using a 3-Way Bulb
Liquefaction of Carbon Dioxide - Part 3 of 4
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INTELECOM
Liquefaction of Carbon Dioxide - Part 3 of 4
Aortic valve calcifications, CT scan
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Steven Needell
Aortic valve calcifications, CT scan
Mitral Stenosis
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Clinical Photography, Central Manchester University Hospitals NHS Foundation Trust, UK
Mitral Stenosis
Heart, Showing Four Valves, Illustration
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Scott Camazine
Heart, Showing Four Valves, Illustration
Heart, Showing Four Valves, Illustration
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Scott Camazine
Heart, Showing Four Valves, Illustration
Anatomy of the Human Heart, Illustration
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Monica Schroeder
Anatomy of the Human Heart, Illustration
Anatomy of the Human Heart, Illustration
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Monica Schroeder
Anatomy of the Human Heart, Illustration
Anatomy of the Human Heart, Illustration
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Monica Schroeder
Anatomy of the Human Heart, Illustration
Anatomy of the Human Heart, Illustration
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Monica Schroeder
Anatomy of the Human Heart, Illustration
Anatomy of the Human Heart, Illustration
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Monica Schroeder
Anatomy of the Human Heart, Illustration
Valve Replacement Surgery
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John Watney
Valve Replacement Surgery
Valve Replacement Surgery
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John Watney
Valve Replacement Surgery
Valve Replacement Surgery
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John Watney
Valve Replacement Surgery
Valve Replacement Surgery
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John Watney
Valve Replacement Surgery
Valve Replacement Surgery
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John Watney
Valve Replacement Surgery
Spigot with Flowing Water
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William H. Mullins
Spigot with Flowing Water
Fire Extinguisher
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PHOTO RF / Science Source
Fire Extinguisher
Pressure Gauge on Pump
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Sigrid Gombert
Pressure Gauge on Pump
Venous Insufficiency after debridement
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Roberto A. Penne-Casanova
Venous Insufficiency after debridement
Venous Insufficiency after debridement
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Roberto A. Penne-Casanova
Venous Insufficiency after debridement
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Healed CVI Wound
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Roberto A. Penne-Casanova
Healed CVI Wound
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Chronic Peripheral Venous Insufficiency
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Roberto A. Penne-Casanova
Chronic Peripheral Venous Insufficiency
Skin Ulcer from a Varicose Vein on the Ankle
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Gwen Shockey
Skin Ulcer from a Varicose Vein on the Ankle
Stand pump attached to a tire
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GIPhotoStock
Stand pump attached to a tire
Stand pump attached to a tire
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GIPhotoStock
Stand pump attached to a tire
Artificial Heart Valve (X-ray)
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Southern Illinois University
Artificial Heart Valve (X-ray)
Rheumatic aortic and mitral valves
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John Watney
Rheumatic aortic and mitral valves
Heart Valves
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VideoSurgery
Heart Valves
Normal Cutaway of Heart
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Brian Evans
Normal Cutaway of Heart
Arrowrock Dam
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David R. Frazier
Arrowrock Dam
Arrowrock Dam
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David R. Frazier
Arrowrock Dam
Diatom, Triceratium favus
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Michael Abbey
Diatom, Triceratium favus
High Blood Pressure
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Mike Agliolo
High Blood Pressure
Pipe Valve Manufacturing, Texas Warehouse
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Gary Retherford
Pipe Valve Manufacturing, Texas Warehouse
Female Body Model and Organ reveal (medium shot)
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INTELECOM
Female Body Model and Organ reveal (medium shot)
Skin Ulcer from a Varicose Vein on the Ankle
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Gwen Shockey
Skin Ulcer from a Varicose Vein on the Ankle
Varicose Veins on the Foot and Ankle
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Gwen Shockey
Varicose Veins on the Foot and Ankle
Skin Ulcer from a Varicose Vein on the Ankle
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Gwen Shockey
Skin Ulcer from a Varicose Vein on the Ankle
Heart Disease, Illustration
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Spencer Sutton
Heart Disease, Illustration
Offshore oil industry montage
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Kenneth Batelman
Offshore oil industry montage
Pipes connecting lungs
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Oliver Burston
Pipes connecting lungs
Pipes connecting lungs
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Oliver Burston
Pipes connecting lungs
Northern Horse Mussel (Modiolus modiolus)
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Andrew J. Martinez
Northern Horse Mussel (Modiolus modiolus)
Heart Valve Replacement, X-Ray
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Scott Camazine
Heart Valve Replacement, X-Ray
Heart Valve Replacement, X-Ray
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Scott Camazine
Heart Valve Replacement, X-Ray
Heart Valve Replacement, X-ray
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Scott Camazine
Heart Valve Replacement, X-ray
Heart Valve Replacement, X-ray
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Scott Camazine
Heart Valve Replacement, X-ray
Pneumonia, Valve Replacement, X-ray
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Scott Camazine
Pneumonia, Valve Replacement, X-ray
Dilation and Aneurysm of Heart Ventricle
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Wellcome Images
Dilation and Aneurysm of Heart Ventricle
Heart Valves, Illustration
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Monica Schroeder
Heart Valves, Illustration
Heart Valves, Illustration
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Monica Schroeder
Heart Valves, Illustration
Heart Valves, Illustration
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Monica Schroeder
Heart Valves, Illustration
Heart Valves, Illustration
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Monica Schroeder
Heart Valves, Illustration
Heart Valves, Illustration
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Monica Schroeder
Heart Valves, Illustration
Heart Valves, Illustration
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Monica Schroeder
Heart Valves, Illustration
Heart Valves, Illustration
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Monica Schroeder
Heart Valves, Illustration
Heart Valves, Illustration
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Monica Schroeder
Heart Valves, Illustration
Heart Valves, Illustration
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Monica Schroeder
Heart Valves, Illustration
Jarvik-7 Artificial Heart Valve
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Hank Morgan
Jarvik-7 Artificial Heart Valve
Jarvik-7 Artificial Heart Valve
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Hank Morgan
Jarvik-7 Artificial Heart Valve
Spigot with Water Drop
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William H. Mullins
Spigot with Water Drop
Spigot with Water Drop
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William H. Mullins
Spigot with Water Drop
Steam Valve for an Engine, 19th century
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SCIENCE SOURCE / Science Source
Steam Valve for an Engine, 19th century
Female Anatomy with Internal Organs
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INTELECOM
Female Anatomy with Internal Organs
Female Anatomy with Internal Organs
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INTELECOM
Female Anatomy with Internal Organs
Diseased Heart, Aneurysm, Illustration, 1897
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Wellcome Images
Diseased Heart, Aneurysm, Illustration, 1897
Heart Anatomy, Illustration, 1739
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SCIENCE SOURCE / Science Source
Heart Anatomy, Illustration, 1739
Blue Mussels
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Andrew J. Martinez
Blue Mussels
Horse Mussels
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Andrew J. Martinez
Horse Mussels
Horse Mussels
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Andrew J. Martinez
Horse Mussels
Heart Valve, SEM
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David M. Phillips
Heart Valve, SEM
Heart Valve, SEM
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David M. Phillips
Heart Valve, SEM
Heart Valve, SEM
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David M. Phillips
Heart Valve, SEM
Heart Valve, SEM
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David M. Phillips
Heart Valve, SEM
Heart Valve, SEM
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David M. Phillips
Heart Valve, SEM
Heart Valve, SEM
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David M. Phillips
Heart Valve, SEM
Aerators at Sewage Treatment Plant
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Phil Degginger
Aerators at Sewage Treatment Plant
Heart Valve, SEM
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David M. Phillips
Heart Valve, SEM
Heart Valve, SEM
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David M. Phillips
Heart Valve, SEM
Heart Valve, SEM
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David M. Phillips
Heart Valve, SEM
Oxygen, Nitrogen and Air Supply
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Photo Researchers, Inc.
Oxygen, Nitrogen and Air Supply
Suction Unit
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Photo Researchers
Suction Unit
Suction Unit
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Photo Researchers
Suction Unit
Suction Unit
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Photo Researchers
Suction Unit
Suction Unit
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Photo Researchers
Suction Unit
Endocarditis
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DNA Illustrations
Endocarditis
Skin Ulcer from a Varicose Vein on the Ankle
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Gwen Shockey
Skin Ulcer from a Varicose Vein on the Ankle
Varicose Veins on the Foot and Ankle
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Gwen Shockey
Varicose Veins on the Foot and Ankle
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