Heart

The heart is an organ within the circulatory system. It is make up of different tissues working together to pump blood.

Our hearts beat every day for all our lives!!! It is made to not get tired. Its the stuff that you control that makes it work harder or normal.... If you want your heart to work normal though, stay away from clolestreol. THat makes your heart pump more things. ______________________________________________________________________ Cardiac muscle or NEVER get tired because cardiac muscle does not use produce lactic acid as a wate productHow_heart_works e-mail@hotmail.co.uk Elliottcollins

It's called as 'angina pectoris'.
Angina pectoris
angina pectoris
Angina pectoris.

The heart pumps blood.

cardiac output :)

The primary reason for conducting a cardiac catheterization is to diagnose and manage persons known or suspected to have heart disease, a frequently fatal condition that leads to 1.5 million heart attacks annually in the United States.

It doesn't. That job belongs to the lungs.

huh? but I've search it here in the answers

Beta blockers are a class of drugs that target the beta receptor. Beta receptors are found on cells of the heart muscles, smooth muscles, airways, arteries, kidneys, and other tissues that are part of the sympathetic nervous system. These blockers interfere with the binding of epinephrine to the beta site and weaken the effects of stress hormones. They slow down the heart rate and are used for high blood pressure, mostly.

The heart does. It pumps vigorously enough to send blood on a complete "round trip" through the body until it returns to be pumped out again, and remember, it has each new heartbeat of blood behind it pushing it along. Takes about 60 seconds, start to finish.

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This is because being dead is defined as stoppage in the functioning of brain and it is not having any relation with the functioning of heart. If the heart stops beating then there is no supply of oxygen rich blood to the brain and hence the brain dies and henceforth the person is declared dead.

There are about 2.3 million couples that marry every year in the United States. This is an average, so it can fluctuate from year to year.

Most heart rate watches are EKG (electrocardiogram) based. Either they come with a strap with EKG electrodes that goes around your chest. This picks up the signals and wirelessly transmits the readings to your watch where you can look at it. Another version is where the electrodes are built into the watch. This is a strapless version but you have to touch the electrodes with your other hand to get the signal.

-- Haider

Houston, TX

The circulation performed by the right side of the heart is the Pulmonary Circulation. When the heart receives oxygen poor blood - because the oxygen in the hemoglobin of the red blood cells has been offloaded to all the body's cells - it enters the first chamber, the right atrium, goes through a valve to the right ventricle, the first valve is closed, the ventricle contracts (the heart is a muscle after all) and ejects its load of blood through a second valve into the pulmonary trunk which splits into two pulmonary arteries that go to the right and left lung. In the lungs, the red blood cells get rid of carbon dioxide that they picked up as waste products from the body's cells, which we breath out, and then picks up a new load of oxygen that we breath in. This oxygen rich blood is returned to heart via the pulmonary veins to enter the Systemic Circulation on the left side of the heart to send the blood out to provide oxygen once again to body cells.

The chordae tendenae prevents the back flow

These valves keep blood flowing in one direction. If they are 'leaky', less will go to the tissues causing the heart to beat more rapidly.

There are two kinds of artificial hearts, an implantable temporary and totally implanted permanent artificial hearts. The function of the artificial heart is to pump blood around the body the same way a normal heart does. IMPLANTABLE TEMPORARY-This is only used in patients for a short time during an operation until a real heart is transplanted into the patient. TOTALLY IMPLANTED PERMANENT- This is used in patients for the remainder of their lives due to faulty heart conditions beyond a transplant.

1982 by Robert Jarvik

the aortic valve
The Aortic valve
The aortic semilunar valve lies between the left ventricle and the aorta.

Are you using this instead of doing homework? Blood comes back into the heart from the lungs via the Pulmonary vein into the Left Atrium.

Deoxygenated blood travels through the veins called the inferior vena cava and superior vena cave into the right atrium. Blood flows from the right atrium, through a valve and into the right ventricle and into the pulmonary arteries. From the pulmonary arteries the blood is carried to the lungs. So the answer is pulmonary artery.

Hearth arrhythmia or irregular heartbeat could be caused by a birth defect, scarring of the heart tissue from an injury to the heart like a heart attack, high blood pressure, smoking, or diabetes as well as other causes.

Well, first off it leaves your heart and moves to your large intestine. It finds solid waste and pushes it up back through your throat until the crap comes out your mouth. This is regular with most humans it happens once or twice a week at most. If this doesn't happen to you you should probably consult your doctor.

Sincerely,

Screw You

In physiological conditions both heart chambers pump equal amounts of blood.

This is a natural consequence of the fact that it is a serial pumping system.

Everything that passes through the right part must also pass through the left part.