- How Does the Blood Flow Through Your Heart
- Cardiology: About Your Heart
- Left ventricle
- How the Heart Works
How Does the Blood Flow Through Your Heart
Echocardiography Essentials: Evaluating right ventricular size and functiondoes season episode the
The right ventricle is the chamber within the heart that is responsible for pumping oxygen-depleted blood to the lungs. It is located in the lower right portion of the heart below the right atrium and opposite the left ventricle. As deoxygenated blood flows into the right atrium, it passes through the tricuspid valve and into the right ventricle, which pumps the blood up through the pulmonary valve and through the pulmonary artery to the lungs. Right side heart failure is a condition when the right side of the heart can no longer pump blood efficiently. This can lead to a rapid heartbeat and other serious problems. Another congenital heart defect, double outlet right ventricle , occurs when the aorta rises from the right ventricle instead of the left ventricle.
The left ventricle is one of four chambers of the heart. It is located in the bottom left portion of the heart below the left atrium, separated by the mitral valve. As the heart contracts, blood eventually flows back into the left atrium, and then through the mitral valve, whereupon it next enters the left ventricle. From there, blood is pumped out through the aortic valve into the aortic arch and onward to the rest of the body. By contrast, the right ventricle solely pumps blood to the lungs. Various conditions may affect the left ventricle and interfere with its proper functioning.
The pulmonary circulation is the portion of the circulatory system which carries deoxygenated blood away from the right ventricle of the heart , to the lungs , and returns oxygenated blood to the left atrium and ventricle of the heart. The vessels of the pulmonary circulation are the pulmonary arteries and the pulmonary veins. A separate system known as the bronchial circulation supplies oxygenated blood to the tissue of the larger airways of the lung. The earliest human discussions of pulmonary circulation date back to Egyptian times. Human knowledge of pulmonary circulation grew gradually over centuries, and scientists Ibn al-Nafis, Michael Servetus, and William Harvey provided some of the first accurate descriptions of this process. Deoxygenated blood leaves the heart, goes to the lungs, and then re-enters the heart; Deoxygenated blood leaves through the right ventricle through the pulmonary artery.
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. Blood flows from your right atrium into your right ventricle through the open tricuspid valve. When the ventricles are full, the tricuspid valve shuts. This prevents blood from flowing backward into the atria while the ventricles contract squeeze. Blood flows from your left atrium into your left ventricle through the open mitral valve.
It is about the size of your clenched fist and sits in the chest cavity between your two lungs. Its walls are made up of muscle that can squeeze or pump blood out every time the heart "beats" or contracts. Fresh, oxygen-rich air is brought into the lungs every time you take a breath. The lungs are responsible for delivering oxygen to the blood, and the heart circulates the blood through the lungs and out to the different parts of the body. The heart is divided into four chambers or "rooms". You can compare it to a duplex apartment that is made up of a right and a left unit, separated from each other by a partition wall known as a septum pronounced SEP-tum. Each "duplex" is subdivided into an upper and a lower chamber.
Almost everyone has heard the real or recorded sound of a heartbeat. When your heart beats, it makes a "lub-DUB" sound. Between the time you hear "lub" and "DUB," blood is pumped through your heart and circulatory system. A heartbeat may seem like a simple, repeated event, but it's a complex series of very precise and coordinated events that take place inside and around your heart. Each side of your heart uses an inlet valve to help move blood between the atrium and ventricle. The tricuspid valve does this between the right atrium and ventricle.
Cardiology: About Your Heart
Click here to view a larger image. The heart is an organ, about the size of a fist. It is made of muscle and pumps blood through the body.
Help lead the fight against cardiovascular disease. The heart consists of four chambers, two atria upper chambers and two ventricles lower chambers. There is a valve through which blood passes before leaving each chamber of the heart. The valves prevent the backward flow of blood. These valves are actual flaps that are located on each end of the two ventricles lower chambers of the heart. They act as one-way inlets of blood on one side of a ventricle and one-way outlets of blood on the other side of a ventricle.
How the Heart Works
The left ventricle is one of four chambers of the heart. left atrium, and then through the mitral valve, whereupon it next enters the left ventricle.
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