what part of the heart pumps blood out of the heart to the lungs?

How Your Centre Works

Larn How the Heart Works

Your heart is an astonishing organ. It continuously pumps oxygen and nutrient-rich blood throughout your trunk to sustain life. This fist-sized powerhouse beats (expands and contracts) 100,000 times per day, pumping five or half dozen quarts of claret each minute, or virtually 2,000 gallons per mean solar day.

How Does Claret Travel Through the Heart?

Equally the middle beats, it pumps claret through a system of blood vessels, chosen the circulatory system. The vessels are elastic, muscular tubes that carry claret to every part of the body.

Blood is essential. In improver to carrying fresh oxygen from the lungs and nutrients to your body's tissues, it besides takes the torso's waste products, including carbon dioxide, away from the tissues. This is necessary to sustain life and promote the wellness of all the body's tissues.

In that location are 3 principal types of claret vessels:

• Arteries. Arteries bear oxygen-rich blood abroad from the heart to all of the torso'southward tissues. They branch several times, becoming smaller and smaller as they deport blood further from the heart and into organs.
• Capillaries. These are small, thin blood vessels that connect the arteries and the veins. Their thin walls allow oxygen, nutrients, carbon dioxide, and other waste products to pass to and from cells.
• Veins. These are blood vessels that accept claret back to the heart; this blood contains less oxygen and is rich in waste products that are to be excreted or removed from the body. Veins become larger as they get closer to the heart. The superior vena cava is the big vein that brings blood from the caput and artillery to the heart, and the junior vena cava brings blood from the belly and legs into the middle.

This vast organization of blood vessels -- arteries, veins, and capillaries -- is over 60,000 miles long. That's long enough to get effectually the globe more than twice!

Blood flows continuously through your body's blood vessels. Your middle is the pump that makes it all possible.

Where Is Your Center and What Does It Look Like?

The heart is located under the rib muzzle, nether and to the left of your breastbone (sternum), and between your lungs.

Looking at the outside of the heart, you can see that the center is fabricated of muscle. The strong muscular walls contract (squeeze), pumping blood to the arteries. The major claret vessels that are continued to the heart include the aorta, the superior vena cava, the inferior vena cava, the pulmonary avenue (which takes oxygen-poor blood from the centre to the lungs, where it is oxygenated), the pulmonary veins (which bring oxygen-rich blood from the lungs to the heart) and the coronary arteries (which supply blood to the heart muscle).

On the within, the heart is a four-chambered, hollow organ. It is divided into the left and right side by a muscular wall called the septum. The right and left sides of the heart are further divided into two pinnacle chambers called the atria, which receive claret from the veins, and two lesser chambers called ventricles, which pump blood into the arteries.

The atria and ventricles piece of work together, contracting and relaxing to pump blood out of the middle in a coordinated and rhythmic fashion. As blood leaves each sleeping room of the eye, it passes through a valve. There are four eye valves within the heart:

• Mitral valve
• Tricuspid valve
• Aortic valve
• Pulmonic valve (as well called pulmonary valve)

The tricuspid and mitral valves prevarication between the atria and ventricles. The aortic and pulmonic valves lie between the ventricles and the major blood vessels leaving the heart.

The heart valves work the aforementioned way every bit one-way valves in the plumbing of your dwelling. They prevent claret from flowing in the incorrect direction.

Each valve has a prepare of flaps, called leaflets or cusps. The mitral valve has two leaflets; the others take three. The leaflets are attached to and supported by a ring of tough, fibrous tissue called the annulus. The annulus helps to maintain the proper shape of the valve.

The leaflets of the mitral and tricuspid valves are also supported past tough, gristly strings called chordae tendineae. These are similar to the strings supporting a parachute. They extend from the valve leaflets to small muscles, called papillary muscles, which are part of the within walls of the ventricles.

How Does Blood Flow Through the Heart?

The right and left sides of the heart work together. The design described below is repeated over and over, causing claret to period continuously to the centre, lungs, and body.

Right side of the middle

• Blood enters the heart through ii large veins, the inferior and superior vena cava, elimination oxygen-poor blood from the body into the right atrium.
• Equally the atrium contracts, claret flows from your right atrium into your right ventricle through the open tricuspid valve.
• When the ventricle is full, the tricuspid valve shuts. This prevents blood from flowing backward into the right atrium while the ventricle contracts.
• As the ventricle contracts, claret leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs, where it is oxygenated. The oxygenated blood and then returns to the middle through the pulmonary veins.

Left side of the eye

• The pulmonary veins empty oxygen-rich blood from the lungs into the left atrium.
• As the atrium contracts, blood flows from your left atrium into your left ventricle through the open mitral valve.
• When the ventricle is full, the mitral valve shuts. This prevents blood from flowing backward into the atrium while the ventricle contracts.
• Every bit the ventricle contracts, blood leaves the heart through the aortic valve, into the aorta and to the body.

How Does Blood Flow Through Your Lungs?

Once blood travels through the pulmonic valve, information technology enters your lungs. This is called the pulmonary circulation. From your pulmonic valve, claret travels to the pulmonary arteries and somewhen to tiny capillary vessels in the lungs.

Here, oxygen travels from the tiny air sacs in the lungs, through the walls of the capillaries, into the claret. At the same time, carbon dioxide, a waste product production of metabolism, passes from the blood into the air sacs. Carbon dioxide leaves the torso when y'all exhale. In one case the blood is oxygenated, it travels back to the left atrium through the pulmonary veins.

What Are the Coronary Arteries?

Like all organs, your middle is fabricated of tissue that requires a supply of oxygen and nutrients. Although its chambers are full of claret, the centre receives no nourishment from this blood. The eye receives its ain supply of blood from a network of arteries, called the coronary arteries.

Two major coronary arteries branch off from the aorta near the point where the aorta and the left ventricle see:

• Correct coronary artery supplies the right atrium and correct ventricle with claret. Information technology branches into the posterior descending artery, which supplies the bottom portion of the left ventricle and back of the septum with blood.
• Left primary coronary avenue branches into the circumflex avenue and the left anterior descending artery. The circumflex artery supplies claret to the left atrium, as well every bit the side and back of the left ventricle. The left anterior descending avenue supplies the front end and bottom of the left ventricle and the forepart of the septum with blood.

These arteries and their branches supply all parts of the heart muscle with claret.

When the coronary arteries narrow to the point that blood flow to the heart muscle is limited (coronary artery affliction), a network of tiny blood vessels in the centre that aren't normally open (called collateral vessels) may enlarge and become active. This allows blood to flow around the blocked artery to the heart muscle, protecting the centre tissue from injury.

How Does the Heart Beat?

The atria and ventricles work together, alternately contracting and relaxing to pump blood through your heart. This is your heartbeat. The electrical system of your heart is the power source that makes this possible.

Your heartbeat is triggered by electrical impulses that travel down a special pathway through your heart.

• The impulse starts in a small parcel of specialized cells called the SA node (sinoatrial node), located in the right atrium. This node is known equally the heart's natural pacemaker. The electrical activity spreads through the walls of the atria and causes them to contract.
• A cluster of cells in the center of the heart between the atria and ventricles, the AV node (atrioventricular node) is like a gate that slows the electrical signal before information technology enters the ventricles. This delay gives the atria fourth dimension to contract before the ventricles do.
• The His-Purkinje network is a pathway of fibers that sends the electrical impulse from the AV node to the muscular walls of the ventricles, causing them to contract.

At rest, a normal heart beats around l to 90 times a minute. Do, emotions, anemia, an overactive thyroid, fever, and some medications can crusade your heart to trounce faster, sometimes to well over 100 beats per minute.

Heart Health Resources

You tin can learn more well-nigh your eye and heart health from these organizations and resource:

American College of Cardiology

world wide web.acc.org

American Eye Clan

www.heart.org

Food and Drug Assistants

world wide web.fda.gov

National Heart, Lung and Blood Institute Health Data Centre

www.nhlbi.nih.gov

CardioSmart

www.cardiosmart.org

The Center.org

www.theheart.org

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Source: https://www.webmd.com/hypertension-high-blood-pressure/hypertension-working-heart

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