12/11/2022 0 Comments To heart 2 adult download![]() Similarly, the left ventricle receives oxygenated blood from the left atrium through the mitral valve. This valve remains closed while the tricuspid valve opens and releases blood into the right ventricle from the right atrium. The semilunar valve connecting the right ventricle to the lungs is the pulmonary valve. This process occurs by systematically opening and closing the atrioventricular and semilunar valves. The right ventricle receives deoxygenated blood that collects in the right atrium. The two lower chambers of the heart are called the ventricles. The flow of deoxygenated blood from the right atrium into the right ventricle is regulated by the tricuspid valve, while the mitral valve controls the flow of oxygenated blood from the left atrium to the left ventricle. However, during pregnancy, the umbilical vein carries oxygenated and nutrient-rich blood from the placenta to the fetus.īoth atria contract and release blood into the ventricles when full, a process controlled by the atrioventricular valves. The pulmonary veins supply oxygenated blood from the lungs into the left atrium and are the only veins in the body to carry oxygenated blood. The superior vena cava brings deoxygenated blood into the right atrium from the upper limbs and head, whereas deoxygenated blood from the lower abdomen and limbs is brought into the heart through the inferior vena cava. The superior and inferior vena cava are major veins that supply the right atrium with deoxygenated blood from the rest of the body. The heart's two upper chambers are called the atria, with the atrial septum dividing the right and left atria. The two exceptions to these are the pulmonary arteries and pulmonary veins, as well as the umbilical artery and vein. Whereas veins bring deoxygenated blood back into the heart, those that carry oxygenated blood away from the heart to other tissues in the body are known as arteries. The smooth functioning of the circulatory system is maintained by a complex network of blood vessels that circulate blood throughout the body and back to the heart. The heart consists of four chambers, four one-way valves, and a set of arteries and veins that regulate the normal flow of blood within the body. Image Credit: Explode / How blood circulates in the heart Typically, the heart is the size of an adult fist and is found enclosed in a pericardial sac at the chest's center, tilted to the left, and underneath the sternum in a thoracic compartment. ![]() The heart is a vital organ of the body therefore, minute dysfunctions or abnormalities in the heart may have drastic consequences on human health. The heart and a network of arteries and veins comprise the cardiovascular system. Reviewed by Benedette Cuffari, M.Sc.Īs the central part of the circulatory system, the heart is responsible for pumping blood, supplying oxygen and nutrients, and removing metabolic waste such as carbon dioxide from all the tissues in the body. ![]()
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