The 4 Major Parts of the Heart: Ventricles, Atria, Valves, and Arteries
What are the four major parts of the heart?
If you’re like most people, then you probably already know that it’s made up of
four chambers – two on the top and two on the bottom. It pumps blood to the
lungs and then to the rest of the body and takes in blood from all over the
body, allowing oxygen to be distributed throughout the body. But exactly how
many parts are there and what are they called? Here’s everything you need to
know about the four major parts of your heart, which includes more than just
those four chambers!
Ventricles are the central chambers in the
heart. The right ventricle pumps blood to the lungs to get oxygen. The left
ventricle pumps oxygen-rich blood to the rest of the body. The pulmonary valve
separates the right ventricle from the lungs, while the aortic valve separates
the left ventricle from other vessels in your body.
The four major parts of your heart are:
ventricles, atria, valves, and arteries. The ventricles are the two main
chambers that pump the blood throughout the body. The right ventricle sends
blood to the lungs where it is oxygenated and then sent back out through the
left ventricle which sends it throughout the entire body. The atria, located on
top of the heart, act as a temporary storage for newly pumped or returning
blood until it is either sent back out or pumped into one of the ventricles to
go through its cycle again. The valves prevent any backward flow so that all your
hard work doesn’t go in vain. Lastly, there are three types of arteries which
carry oxygen rich (or deoxygenated) blood away from the heart to the body's
tissues. These are the Coronary Artery, Pulmonary Artery, and Aorta. The
Coronary artery provides blood to the heart muscle itself and branches off into
smaller arteries that supply the myocardium with oxygen-rich blood. The
Pulmonary artery carries oxygen-poor blood from the right side of the heart to
be exchanged for freshly oxygenated blood in the lungs. The Aorta delivers
oxygen rich red cells from the left ventricle directly to every tissue in your
body through thousands of smaller branching arteries called arterioles . The
last word you might be wondering about is the word valve. Valves can also play
an important role when it comes to the function of the heart. There are 3
different kinds of valves; semilunar, tricuspid, and mitral. The semilunar
valve sits between the two upper chambers (atria) of the heart and only has one
leaflet unlike the tricuspid or mitral valve which both have three leaflets
each. The semi-lunar valve mainly works by preventing leakage from the atrium
into the ventricle since they share a wall between them but this valve also
prevents regurgitation in some cases due to pressure differences across its
leaflet surface area.
The two types of atria are the left atrium
and the right atrium. The left atrium is located in the upper part of the
heart. It receives blood from the veins that return blood from the body back to
the lungs for oxygenation. The right atrium is located in the lower part of the
heart. It receives blood from the veins that return blood from air-filled lungs
to be pumped out with each heart contraction.
Ventricles are chambers within your heart
that hold and pump blood around your body through arteries or veins. The two
major ventricles are the left ventricle and the right ventricle. The left
ventricle is located in the bottom-left area of the heart. The right ventricle
is located in the bottom-right area of the heart. Blood enters both ventricles
via a valve called the pulmonary valve (the pulmonary artery connects to this
valve). Blood flows from one ventricle into a large artery called the aorta,
which pumps it out to all parts of your body.
The valves prevent blood from flowing backwards by opening and closing as needed when blood moves between these chambers or when one chamber contracts while another chamber relaxes. The four major valves are the mitral valve, the tricuspid valve, the pulmonary valve, and the aortic valve. The mitral valve is located in the middle of the left atrium near its junction with the left ventricle. The tricuspid valve is located in the middle of the right atrium near its junction with the right ventricle. The pulmonary valve separates blood flow from your lungs to your heart's main pumping chamber, and also prevents backflow into them when you exhale or inhale. The aortic valve separates blood flow from your heart's main pumping chamber to vessels leading out to other organs such as your head, arms and legs . The pulmonary valve separates blood flow from the lungs to the heart's main pumping chamber, and also prevents backflow into them when you exhale or inhale.
3) Valves
The valves are used to keep the blood flowing in a single direction. The mitral valve is situated between the left atrium and the left ventricle. When this valve opens, it allows blood to flow from the left atrium into the left ventricle. The tricuspid valve separates the right atrium from the right ventricle. When this valve opens, it allows blood to flow from the right atrium into the right ventricle. The pulmonary valve separates the right ventricle from the pulmonary artery which carries deoxygenated blood to the lungs. The semilunar valves in the veins prevent backflow of venous return when these vessels contract after filling with fresh oxygenated blood coming from the lungs or elsewhere. The coronary arteries supply the heart muscle with oxygen-rich blood that comes from the left side of the heart (left coronary artery) and sometimes from both sides (right coronary artery). The coronaries divide into smaller branches supplying individual heart muscle cells with life-giving nutrients and oxygen until they become microscopic capillaries. The diastolic phase begins when the heart muscle relaxes and becomes filled with blood, stretching the cardiac fibers. The part of the myocardium next to the septum moves up while on the other side it moves down because of the higher pressure inside the left ventricle as compared to outside. Now, with time passing by and not enough space for both sides to move up anymore, one will eventually stop moving up while another starts moving down. As long as there is still more room for the top half on either side there will be no problem; but if not, then an area next to one's septum could bulge outwards causing high pressure inside the chest cavity – commonly called a rupture or aneurysm. The four major parts of the heart include the ventricles, the atria, the valves and the arteries. The ventricles are two muscular chambers in your heart where blood flows in before pumping through your body. The atria are two small chambers on top of each other just below your ventricles. They store oxygen-depleted blood that returns to your heart. A healthy heart has strong muscles lined with tough fibrous material known as endocardium tissue - this helps make sure nothing bad can happen to any of the four major parts of the heart
4) Arteries
Arteries are tubes that carry blood from the heart to the body. They are the largest blood vessels in your body. The four major parts of the heart are ventricles, atria, valves, and arteries. The two ventricles pumps all the oxygen-rich blood to the lungs (to pick up more oxygen) and then pump it out again to all parts of your body. The right atrium receives deoxygenated blood from your entire body through veins that lead back to it. The left atrium receives oxygenated blood from your lungs through pulmonary veins that lead back to it. There is a valve between both atria; this prevents any reversed flow between them when one is receiving more oxygen than the other is receiving less. The two upper chambers are the right and left atria. The lower chambers are the right and left ventricles. Blood flows into the upper chambers via the superior vena cava or the inferior vena cava respectively. When an individual is standing upright, gravity helps keep blood flowing down into the lower chamber via the venae cavae or coronary sinus respectively . The valves make sure that the blood only moves in one direction, preventing any possible backward flow. The mitral and tricuspid valves are located within the left and right atria respectively. These work with the septum which divides the heart into left and right halves to allow proper pumping action by each side of the heart. The right atrium's muscular walls are thin so the blood can easily squeeze through them, but the left atrium has much thicker walls so it doesn't need to contract as hard for the same effect. The pulmonary artery carries blood away from the heart to be distributed throughout the body via the lungs while the aorta carries blood away from the heart to be distributed throughout your whole body. The coronaries have six sets of three progressively smaller arteries branching off of them which supply each part of your heart muscle with nutrient-rich arterial blood. The semilunar valves - named for their shape - function like traffic roundabouts. They sit on either side of the opening where a vessel leaves a hollow organ, controlling what comes in and what goes out.
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