Download illustrations of human circulatory system: gross anatomy, cardiac cycle, heart diseases and congenital defects, cardiovascular conditions and surgery treatment, blood cell formation, vascular disorders, and more.

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Blood flow in vessel, medical drawing.

Red blood cells streaming in artery

Elements of blood, medical drawing.

Illustration of red and white blood cells, lymphocytes, monocytes, platelets, basophil, eosinophil, neutrophil.

Atherosclerosis, unlabeled.

Blood clot forms on cholesterol plaque in artery blocking blood flow.

Atherosclerosis, labeled.

Blood clot forms on cholesterol plaque, blocked artery.

Process of cholesterol plaque in artery, unlabeled

Diagram showing process of cholesterol plaque in artery, unlabeled version.

Stages of Atherosclerosis

Process of cholesterol plaque build-up in artery, labeled diagram.

Leukemia versus normal blood count, illustration.

Cancer of blood, Anemia, medical drawing.

Brain stroke diagrams

Ischemic versus Hemorrhagic brain stroke, unlabeled.

Blood supply to the brain diagram

Lateral view of the brain with middle cerebral artery, unlabeled.

Stages of atherosclerosis diagram

Cholesterol plaque build-up in blood vessel and formation of blood clot cause blockage of blood flow, labeled.

Clipart of healthcare icon (cardiology)

Magnifying glass on an ECG graph diagram

Cardiac arrhythmias ECG/ EKG set diagram.

Normal and pathological electrocardiograms in heart diseases.

EKG and myocardium function diagram

Phases of electrical activity of human heart, ECG cycle.

Myocardial infarction diagram (heart attack)

Coronary artery blocked by cholesterol plaque causing heart stroke.

Human heart blood flow

Illustration of blood flow through the heart, labeled

Human heart blood flow

Illustration of blood flow through the heart, unlabeled

Blood supply to the heart unlabeled diagram

Coronary arteries illustration, anterior view of the heart

Blood supply to the heart labeled diagram

Coronary arteries illustration, anterior view of the heart

Human heart cut, medical illustration.

Heart anatomy diagram, unlabeled.

Left ventricular hypertrophy labeled diagram

Thickening of the myocardium of left ventricle of human heart.

Electrical pathways of the heart, unlabeled

The cardiac conduction system of human heart, unlabeled version.

Heart valves operation, unlabeled diagram.

Cycles of heart valves operation pumping blood through different chambers, aorta and veins.

Electrical pathways of the heart

The cardiac conduction system of human heart, labeled version.

Abdominal aortic aneurysm diagram

Aneurysm in aorta of the abdomen and bleeding risk.

Deep vein thrombosis diagram

Abnormal blood clotting in deep leg vein and formation of thrombus.

Tetralogy of Fallot diagram

Congenital heart disease: Tetralogy of Fallot, labeled

Ventricular septal heart defect diagram.

Congenital heart disease: ventricular septal defect, hole in the septum between ventricles, unlabeled.

Balloon angioplasty procedure diagram

Heart cath procedure with balloon to widen artery with plaque

Heart and lungs diagram unlabeled

Human lungs and heart anatomy, unlabeled.

Thorax anatomy unlabeled diagram.

Human heart cross section and lungs anatomy.

Biofeedback regulation of heart rate, medical illustration.

Regulation of blood pressure through baroreflex, unlabeled version.

Biofeedback regulation of heart rate, labeled.

Regulation of blood pressure through baroreflex, labeled version.

Blood supply to the head and neck, labeled drawing.

Diagram of human head anatomy with arteries including internal carotid supplying the brain, lateral (side) view, labeled.

Blood supply to the brain, coronal section.

Middle cerebral artery anatomy and distribution, labeled diagram.

Metastatic cancer, medical drawing.

Cancer cell squeezes through the endothelium of blood and lymph vessel, illustration unlabeled.

Human circulatory system diagram

Anatomy of human circulation system, unlabeled.