How Does Blood Flow and Pressure Work in the Human Heart?

[dhbeno]

I have a school assignment about the physics of the human heart, primarily about the pressures in the ventricles and atriums, what causes the valves to open and what makes blood flow from the atrium to the ventricle, what is the pressure and where? I already know how what makes the heart beat (from the electrical point of view) Does anyone know more about this topic? Thank you! :)

 

[256bits]

Shouldn't you being doing some attempt at research on the topic? If so, what have you already found? Do you find that there is a particular aspect of the workings of the heart from your research that begs a particular question?

 

[adjacent]

I have a school assignment about the physics of the human heart, primarily about the pressures in the ventricles and atriums, what causes the valves to open and what makes blood flow from the atrium to the ventricle, what is the pressure and where? I already know how what makes the heart beat (from the electrical point of view) Does anyone know more about this topic? Thank you! :)

http://lmgtfy.com/?q=blood+flow+in+the+heart

The valves between atrium and ventricles are called atrio-ventricular valves. They can only open to one side,that is, towards the ventricle side. So when the blood flow from atria to ventricle,the valve is open.When it tries to flow from ventricle to atria,it get's closed. There are thousands of images out there.
Ventricles contract to make pressure. As you know, pressure is inversely proportional to volume. As the volume decreases,pressure increases.

 

[Sophia Lee]

Sharing the links which may help you get correct information and you will be able to know about the pressures in the ventricles and atriums, what causes the valves to open and what makes blood flow from the atrium to the ventricle, what is the pressure and where?

http://www.rnceus.com/hemo/bloodflo.htm


Let me know if you have any doubt.

Thanks

 

[DeeNos]

I can provide some insights on the physics of the human heart. The heart is a complex organ that functions as a pump to circulate blood throughout the body. It consists of four chambers - two atria and two ventricles. The atria receive blood from the body and lungs, while the ventricles pump blood out to the rest of the body.

The pressure in the heart is constantly changing as it goes through the cardiac cycle. During diastole, when the heart is relaxed, the pressure in the atria is higher than in the ventricles. This allows the blood to flow from the atria to the ventricles through the open atrioventricular (AV) valves. The AV valves, also known as the tricuspid and mitral valves, are responsible for preventing backflow of blood into the atria when the ventricles contract.

As the ventricles contract during systole, the pressure in the ventricles increases, causing the AV valves to close and the semilunar valves (aortic and pulmonary valves) to open. This allows blood to be pumped out of the heart to the rest of the body. The pressure in the ventricles during systole is much higher than in the atria, allowing for efficient blood flow.

The pressure in the heart is measured in millimeters of mercury (mmHg), with the normal range for a healthy adult being around 120/80 mmHg. This is the pressure in the aorta (the main artery leaving the heart) and the pressure in the left ventricle during systole, respectively.

In terms of what makes the heart beat, as you mentioned, it is controlled by electrical signals from the sinoatrial (SA) node, also known as the pacemaker of the heart. These signals cause the heart muscles to contract and relax in a coordinated manner, resulting in the rhythmic beating of the heart.

I hope this information helps with your assignment. If you have any further questions about the physics of the human heart, please don't hesitate to ask.