License Image The superior vena cava and inferior vena cava (not shown) bring deoxygenated blood from the body into the right atrium, from which it enters the right ventricle. Blood leaves the right ventricle via the pulmonary trunk. The pulmonary trunk delivers deoxygenated blood to the lungs. It splits into the right and left pulmonary […]
License Image This cross section of the heart shows the right ventricle, tricuspid valve, left ventricle, bicuspid (mitral) valve, left atrium, right atrium, superior vena cava, inferior vena cava, aorta, aortic valve, papillary muscle, chordae tendineae, and trabeculae carneae. The heart ventricular walls consist of three layers: the 1.epicardium, the 2.myocardium (cardiac muscle), and the […]
License Image When the heart must work harder to pump blood because of increased systemic vascular resistance, the heart’s left ventricle muscular walls get thicker, such as a biceps muscle will get larger after weight training, This is called left ventricular hypertrophy. The most common cause is high blood pressure or hypertension.
License Image The coronary arteries supply oxygen to the heart muscle. When an artery is narrowed by atherosclerotic plaque, the blood flow and therefore, oxygen supply to the heart muscle is decreased, causing myocardial ischemia (angina). If a blood clot or atheroma blocks the artery completely, oxygen is cut off and the area of the […]