Four Valves Of The Heart Research Paper

Heart valves ensure one way blood flow through heart. The atrioventricular (AV) valves lie between the atria and the ventricles prevents the back flow of blood in to the atria while the ventricles contract. Chordae tendinae anchor AV values to papillary muscles. The left AV valve, the mitral or bicuspid valve consists of two cusps of endocardium. The right atrioventricular valve, the tricuspid valve, has three cusps. The second sets of valve are the semilunar valves. The pulmonary semilunar valves lie between the right ventricle and pulmonary trunk. Aortic semilunar valves lie between ventricle and the aorta. Semilunar valves prevent the backflow of blood into the ventricle.

The four valves of the heart are the tricuspid valve, the pulmonic valve, the mitral valve, and the aortic valve. The tricuspid valve is located between the right atrium and the right ventricle. It is responsible for allowing blood to flow from the atrium to the ventricle, preventing backflow of blood into the atrium. The pulmonic valve is located between the pulmonary arteries and the right ventricle and is responsible for allowing blood flow from the heart to the lungs. The mitral valve is found between the left atrium and the left ventricle, which allow blood to flow from the left atrium into the left ventricle preventing backflow of blood back into the left atrium. The aortic valve is found between the aorta and the left ventricle and allows blood to flow to the aorta and throughout the body.

The heart is basically a pump that has to circulate the blood around the body delivering oxygenated blood to our organs and then returning deoxygenated blood to our lungs. There are four chambers in the heart, two atria and two ventricles. There are four main valves, mitral, aortic, tricuspid and pulmonary7b.

R E V I E W S H E E T 30 Anatomy of the Heart

The mitral valve is located on the left side of the heart between the left atrium and left ventricle. The purpose of the mitral valve is to form a seal between these two chambers of the heart to prevent the back flow of blood. When blood enters the left side of the heart, it is oxygenated and enters through the pulmonary veins. The blood then travels through the left atrium; the bicuspid (mitral) valve then opens to let the blood flow down to the left ventricle. The left ventricle contracts, causing the mitral valve to close (preventing the backflow of blood).When the left ventricle contracts it is pumping the blood out to the remainder of the body. (Jenkins, 2007)

Next stop. Right atrium. One of the four chambers of the heart, the right atrium lets deoxygenated blood to pass through the tricuspid valve into the right ventricle and from there to the lung to oxygenate. The tricuspid valve, also known as right atrioventricular valve is located between the two chambers and it looks like flaps that blocks blood flowing back into the atrium. (Yahoo Health, 2013) The right ventricle of the heart has the mission to pump the blood into the pulmonary artery via the pulmonary valve and pulmonary trunk right into the lungs. Ready to go through the pulmonary valve into the pulmonary artery? Here we go! Weeeee…..

Almost 80% of people die from heart disease. The only way to know your level of risk is to be assessed by a healthcare professional and to be checked for factors such as your blood pressure, cholesterol and glucose levels, waist measurement and BMI. Once you know your overall risk, agree with your healthcare professional on a plan for specific actions you should take to reduce your risk for heart disease and stroke. The Circulatory System is made up of three main parts: The heart, the blood vessels and the blood. Sometimes the watery fluid called lymph and the vessels that carry it are considered to be part of the Circulatory System. The heart is a special pump that pumps the blood around the body. The purpose of this paper was to summarize information about the heart, explain how it works, and discuss its purpose. It was said that the heart evolves through several different stages inside the womb, first resembling a fish's heart, then a frog's, which has two chambers, than a snake's, with three, before finally adopting the four-chambered structure of the human heart. I also told you how the heart works. When the heart contracts, the chambers become smaller, forcing blood first out of the atria into the ventricles, then from each ventricle into a large blood vessel connected to the top of the heart. Now the purpose of the heart is the size of its owner's clenched fist, the organ sits in the middle of the chest, behind 1the breastbone and between the lungs, in a moistened chamber that is protected all round by the rib cage. It can also be easy to fix the heart. The only way to know your level of risk is to be assessed by a healthcare professional and to be checked for factors such as your blood pressure, cholesterol and glucose levels, waist measurement and BMI. The heart is very important for your

Mitral valve disease effects the cardiovascular system. In a healthy animal deoxygenated blood flows into the heart from the vena cava into the right atrium, it then passes through the tricuspid valve into the right ventricle. From here the blood travels through the pulmonary artery to the lungs where is it oxygenated, next it flows from the lungs to the left atrium via the pulmonary vein. Here it passes through the mitral valve to the left ventricle

A heart valve allows blood to flow in only one direction through the heart. Tissue heart valves are harvested from pig heart valve or a cow heart sac. These tissues are treated, neutralized, mounted on a frame or stent so the body will not reject them. A tissue valve lifetime is 10-15 years. An advantage in a tissue heart valve replacement is that there are fewer requirements for anticoagulation therapy which reduces an incidence of bleeding. Mechanical heart valves are made out of pyrolytic carbon and last up to 20-25 years. A mechanical heart valve requires warfarin anticoagulation therapy and there is a risk for bleeding (Silberman, 2008).

has to work harder pumping blood to the rest of the body. Blood in our

Every year about five million Americans with a heart valve disease. Heart valve disease occurs when one or more of the heart valves does not function properly. Your heart has four valves that keep the blood flowing in the correct direction. In some cases, one or more of the valves don't open or close properly. This can cause the blood flow through your heart to your body to be disrupted. These factors change the shape or flexibility of once-normal heart valves. The cause of congenital heart valve disease isn't known, but in some cases it occurs before birth as the heart is forming. Your heart valves lie at the exit of each of the chambers and maintain one-way blood flow through your heart. When the ventricles are full of blood after each

Artificial heart valve is a device implanted in the heart of a patient with valvular heart disease. When one of the four heart valves malfunctions, the medical choice may be to replace the natural valve with an artificial valve. This requires open-heart surgery. Valves are integral to the normal physiological functioning of the human heart. Natural heart valves are evolved to forms that perform the functional requirement of inducing unidirectional blood flow through the valve structure from one chamber of the heart to another. Natural heart valves become dysfunctional for a variety of pathological causes. Some pathologies may require complete surgical replacement of the natural heart valve with a heart valve prosthesis [34].The mid twentieth century kick started the

There is a such thing as a heart valve disease. All four valves can be stenotic (hardened, restricting blood flow); the conditions are called tricuspid stenosis, pulmonic stenosis, mitral stenosis or aortic stenosis. Valvular insufficiency. Also called regurgitation, incompetence or "leaky valve", this occurs when a valve does not close tightly. A heart valve is a heart valve normally allows blood to flow in only one direction through the heart. The four valves commonly represented in a mammalian heart determine the pathway of blood flow through the heart. A heart valve opens or closes incumbent on differential blood pressure on each side. A heart valve is the aortic valve and the mitral valve are the most commonly replaced valves. Pulmonary

Heart valves are tissue paper thin membranes attached to the heart wall that constantly open and close to regulate blood flow. The heart has 4 valves: Mitral and tricuspid valve, which control blood flow from the atria to the ventricles and aortic and pulmonary valve, which control blood flow out of the ventricles. A normal, healthy heart valve minimizes any obstruction and allows blood to flow smoothly and freely in one direction. It closes completely and quickly, not allowing any blood to flow back through the valve. (Rongrong et al, 2016).

The heart has four chambers, associated with the pulmonary and systemic circuit. It starts from the systemic circuit by receiving blood to the right atrium and passing it to the right ventricle and then pumps into the pulmonary circuit. Then it collects it at the left atrium and empties into the left ventricle which pumps blood back to the systemic circuit. Arties carry blood away from the heart and veins return blood to the heart.