An image shows a three-part illustration of the cardiovascular system. The first image shows a human female body and the structures labeled are heart, arteries and arterioles, veins and venules, blood, and capillaries. The heart is located in the middle of chest. The right and left atria and ventricles are highlighted. Aorta and superior and inferior vena cava are also presented. The arteries and arterioles pass from the regions of the head and chest to limbs. The thoracic aorta and abdominal aorta are present in the chest region with the arteries passing through the limbs. The veins and venules pass from the regions of the head and chest to limbs. The superior vena cava and inferior vena cava are present in the chest region with the veins passing through the limbs. The second image is the red blood cell, which resembles many circles with thin centers. The third image is a micrograph of a capillary, which points to the capillaries in the left arm of the first image. The capillaries show the red blood cells passing through plasma. The heart, arteries and arterioles, veins and venules, blood, and capillaries link to more detailed screens. Text at the bottom of the screen reads; The cardiovascular system is responsible for transporting substances to and from all body cells via the flow of blood. It also has a role in disease resistance and regulating pH.