What makes the Human heart beat and continue to beat for years and years ?

Answer 1

Electrical impulses fired in the sinoatrial node

Answer 2

Taking care of it first and foremost! The heart works 24 hours a day, 7 days a week without a break and if you take care of it, it will take care of you. It is a very complex and awesome part of our body. It has its own feeding system and its own electrical system. We have "nodes" in the heart. the SA (sinoatrial) node that initiates electrical pulses to the AV node which branches out into other areas. In laymans terms, this shocks the heart into contacting to push blood through the body. The heart needs to be nourished also so instead of giving all that blood back to the rest of the body, it keeps a little for itself. Its called coronary circulation. Now I could go on forever about the heart, but I don't think your fishing for a cardiac lesson so I'll simplify and say what we feed our body and how we treat it is what determines how long it will work for us. Most young people take the heart for granted, and just assume it will be there forever, but the simple truth is...If you are neglecting to the heart when you are young, you may not get old enough to make it back up so eat healthy and exercise so that it will be around to take care of you for a long time. Hope this helps.

Answer 3

the answer is : SA node (sinoatrial node) – known as the heart’s natural pacemaker

The impulse starts in a small bundle of specialized cells located in the right atrium, called the SA node. The electrical activity spreads through the walls of the atria and causes them to contract.


How does the heart beat?

The atria and ventricles work together, alternately contracting and relaxing to pump blood through your heart. 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.

SA node (sinoatrial node) – known as the heart’s natural pacemaker
The impulse starts in a small bundle of specialized cells located in the right atrium, called the SA node. The electrical activity spreads through the walls of the atria and causes them to contract.

AV node (atrioventricular node)
The AV node is a cluster of cells in the center of the heart between the atria and ventricles, and acts like a gate that slows the electrical signal before it enters the ventricles. This delay gives the atria time to contract before the ventricles do.

His-Purkinje Network
This pathway of fibers sends the impulse to the muscular walls of the ventricles and causes them to contract.

At rest, a normal heart beats around 50 to 99 times a minute. Exercise, emotions, fever and some medications can cause your heart to beat faster, sometimes to well over 100 beats per minute.

more about SA NODE:
Role as a pacemaker
Although all of the heart's cells possess the ability to generate the electrical impulses (or action potentials) that trigger cardiac contraction, the sinoatrial node is what normally initiates it, simply because it generates impulses slightly faster than the other areas with pacemaker potential. Because cardiac myocytes, like all muscle cells, have refractory periods following contraction during which additional contractions cannot be triggered, their pacemaker potential is overridden by the sinoatrial node.

Cells in the SA node will naturally discharge (create action potentials) at about 70-80 times/minute. Because the sinoatrial node is responsible for the rest of the heart's electrical activity, it is sometimes called the primary pacemaker.

If the SA node does not function, or the impulse generated in the SA node is blocked before it travels down the electrical conduction system, a group of cells further down the heart will become the heart's pacemaker. These cells form the atrioventricular node (AV node), which is an area between the atria and ventricles, within the atrial septum.


Role as a pacemaker
Although all of the heart's cells possess the ability to generate the electrical impulses (or action potentials) that trigger cardiac contraction, the sinoatrial node is what normally initiates it, simply because it generates impulses slightly faster than the other areas with pacemaker potential. Because cardiac myocytes, like all muscle cells, have refractory periods following contraction during which additional contractions cannot be triggered, their pacemaker potential is overridden by the sinoatrial node.

Cells in the SA node will naturally discharge (create action potentials) at about 70-80 times/minute. Because the sinoatrial node is responsible for the rest of the heart's electrical activity, it is sometimes called the primary pacemaker.

If the SA node does not function, or the impulse generated in the SA node is blocked before it travels down the electrical conduction system, a group of cells further down the heart will become the heart's pacemaker. These cells form the atrioventricular node (AV node), which is an area between the atria and ventricles, within the atrial septum.



Electrical Conduction Heart Impulse
In a normal heart, the sinoatrial node, or SA node is considered the "pacemaker" of the heart. It is located in the right atrium. Impulses originate in the SA node and cause atrial contraction, and subsequently spread throughout the heart. Once the impulse spreads through the atria, it passes to the atrioventricular or AV node down the septum of the heart. The impulse causes contraction of the ventricles as it travels to the inferior portions of the heart through the right and left bundle branches and ultimately to the purkinje fibers in the inferior part of the ventricles, which causes ventricular contraction. Some abnormalities in the tissue of the heart will create electrical pathway disturbances (or blocks) of impulses and require external mechanisms such as pacemakers to sustain the normal heart rate.

Answer 4

Your brain. The heart is an involuntary muscle, which is controlled by the brain, meaning that it does not require thought process to function properly. That is how the heart works.

Answer 5

Please see the web page for more details on Human heart. The answer to your question still remains as a mystery.

Answer 6

Yo brain ofcourse

Answer 7

the human bran /and it's a mussel

Answer 8

God knows...