Cross-section of human heart. cardiovascular system Electrical conduction in the heart controlled by pacemaker cells in the sinoatrial node. Heart and Brain Heart attack, artwork Cardiovascular system, historical artwork Red blood cells and molecules, artwork Pulmonary veins and arteries. circulation, cardiovascular system Blood clot, SEM Heart anatomy, 19th Century illustration Heart anatomy, 18th century Heart anatomy, 19th Century illustration Veins and nerves of the neck. cardiovascular system, nervous system Arterial supply and venous drainage of the organs. Arteries of the posterior abdominal wall. cardiovascular system Veins of the posterior abdominal wall. cardiovascular system Coronary artery disease Illustration of coronary artery atherosclerosis Superficial arteries and veins of face and scalp. cardiovascular system Microscopic view of blood clotting inside the artery Heart disease, artwork Anatomy of human body and circulatory system, front view Human upper body showing bones, lungs and circulatory system Human heart, artwork Circulatory system and brain, artwork Artwork of bronchodilator action in asthma Blood vessel anatomy Cut artery, artwork The arteries of the brain Cardiovascular system, artwork Structure of a human heart, artwork Transverse section of an artery. cardiovascular system, circulatory system Arterial embolism Internal view of the human heart Human body showing heart and main circulatory system position Anatomy diagram showing crucial veins in human head and neck Artwork of cerebral embolism, cause of stroke Blood cells in blood vessel, artwork Artwork of lung oedema in heart failure Blood vessel Human foot anatomy showing skin, veins, arteries, muscles and bones Build-up of atherosclerotic plaque in an artery Heart anatomy, 19th Century illustration Anatomy of human circulatory system Cross section of human heart Circulatory system and brain, artwork Human heart, artwork Human head with bone, muscles and circulatory system The arteries of the brain Page 2