Human heart diagram

Human heart diagram helps to identify different organ into heart. Human heart is major organ in the human body. Heart plays an important rule and its function is truly fascinating. Human heart performs highly specific function although it is small in size. Diagrams of the human heart are help to identify different organ into heart. The article human heart diagram and short description on each part of the human heart are given below:

Labeled Human heart diagram

Normally heart located under the ribcage in the center of chest between right and left lungs. The main function of heart is pumping blood continuously to all part of body. The adult heart pumps about 1,500 to 2,000 gallons per day. The heart size is depending on age, size and the condition of heart. Sometime heart becomes large due to some disease.

The human heart diagram resembles the shape of an upside-down pear, weighing between 7-15 ounces, and is little larger than the size of the fist. Heart enclosed in a bag like structure that called the pericardium. It is located between the lungs, and that are in the middle side of chest. Human heart is one of the most vital organs. Human heart pumps blood and distributed all the body. Per minute normally human heart beat approximately 70-72 time. Human heart pump oxygenated blood all the body. Observing the human heart diagram it will help to comprehend the different parts of the human heart.

The human heart

The human heart is one of the most essential organs in the whole human body. The human heart is really nothing more than a blood pump, composed of muscle that pumps blood throughout the entire body and beating approximately 73 times per minutes. The heart pumps the blood that carries all the important material which helps our bodies function. It also removes the waste chemical that we do not need anymore. For example, brain requires glucose and oxygen, which, if not accepted continuously, will cause it to lose consciousness. Normally muscles need glucose, amino acid and oxygen, as well as the appropriate ratio of calcium, potassium and sodium salts in order to contract generally. The gland needs adequate supplies of raw materials from which to produce the specific secretions. If the human heart ever stops to pump blood in the body, then the body begins to shut down and after a short period of time the person will die.

The human heart: blood vessels

In general sense, usually a vessel is defined as hollow instrument for carrying something like a cup or a tube or bucket. Blood vessels are hollow toots or tube for carrying blood and it located throughout the body. The human heart blood vessels are hollow tube that circulates the blood.

There are 3 varieties of blood vessel in the human heart blood vessels: those are arteries, veins and capillaries. Normally the arteries carry blood away from the human heart during blood circulation. The blood capillaries are connected to the arteries to veins and finally the veins carry the blood back into the human heart.

If you took all of the human blood vessels out of an average kids, and then it laid in one line, the blood vessel line would be 60,000 miles long, an and adults blood vessels would be more than 90,000 miles.

Besides circulating blood, blood vessels normally provide 2 important means of measuring major health statistics: those are blood pressure and pulse. We usually measure pulse or heart rate by touching an artery. Normally the rhythmic contraction of the blood artery keeps velocity with the beat of the human heart. An artery is near to the surface of the skin, on the other hand the heart is deeply protected and we can easily touch the blood artery and find an exact measure of the human heart pulse.

Atria and Ventricles in the human heart diagram:

In the human heart diagram it is monitor that the heart comprise four chambers, those are right atrium, left atrium, right ventricle and left ventricle. The two upper chambers are called the left and the right atria, and the two lower chambers are known as the left and the right ventricles. In the human heart diagram two atria and ventricles are separated from each other by a muscle wall called ‘septum’. The septum separates the ventricles from each other, and can be seen in the labeled heart diagram.

Valves in the Human heart Diagram

In the heart diagram of the human it is shown that four types of valves which regulate the flow of blood through the heart.  In the human heart diagram it is clearly shown. Valves permit blood flow in one direction only and it prevent backflow of blood. Four types of valve are given below:

Human heart diagram

Human heart diagram

Tricuspid Valve

It observes in the diagrams of the human heart, this valve separates the right atrium from the right ventricle, and regulates the blood flow between them. Also referred to as the atrioventricular valve, the tricuspid valve allows blood to flow from the right atrium into the right ventricle.

Pulmonary Valve

In the human heart diagram one can observe that this valve separates the right ventricle from the left pulmonary artery. This valve is a semi lunar valve, with three cusps. As the right ventricle contracts, the valves open and blood flows into the left pulmonary artery.

Mitral Valve

Mitral Valve also calls bicuspid valve. This Mitral Valve has two caps. As observing in the human heart diagram, this valve separates the left ventricle from the left atrium.

Aortic Valve

It seen in the human heart diagram this valve separates the left ventricle from the aorta, and controls the blood flow from the ventricle into the rest of the body.

Veins in the Human heart Diagram

In the human heart diagram it shown that veins look like as arteries. They are not strong as like as arteries. They do not transport blood at high pressure. Blood containing waste product is received by veins after exchange carbon dioxide and oxygen takes place between the arteries and capillaries.

 Pulmonary Vein

Normally we know vain means it carrying deoxygenated blood to the lung. But pulmonary vain is not like that. It carries oxygenated blood from the lungs to the left side of the heart. The pulmonary vein has four branches: two right pulmonary veins and two left pulmonary veins. All four branches pour oxygenated blood into the left atrium of the heart.

Heart diagram

Human heart diagram

Human heart diagram

Heart diagram is the outlook figure of heart. The human heart is situated under the ribcage. Its major function is pumping blood continually, muscular wall beat or contraction and blood pumping to all the parts of the body. There are two sides of human heart; these are left and right side. Both of the sides act as blood pumping. In human heart diagram the two sides are again divided into two chambers and four chambers in total. In heart diagram upper chamber are normally called ARTRIA and they collect blood. In heart diagram lower chambers are called VENTRICLES and they there function is contract to pump the blood our.

Heart diagram anatomy

Left side of the heart

At first blood coming from the lungs into the collects in the left atrium. This then initiates the contraction of the wall to the left atrium and forcing the mitral valves.

In heart diagram the left ventricle fills with blood which then forces the mitral valve to stop and initiate left ventricle muscle to contract. Then open the aortic valve and then squeeze the blood through the aortic valve.

Right side of the heart

At first blood coming from the body into the heart collects in the right atrium. Then initiate a contraction right atrium walls forcing the Tricuspid Valve to open. The right ventricle is filled with bloods which then forces the tricuspid valve for close and then initiate the right ventricle muscle to contract, then open the Plutonic Valve squeeze the blood through the Plutonic Valve.

The coronary arteries

In heart diagram the coronary arteries is the branch off the aorta. It is the main artery that taking blood away from the heart to every corner of the body. The coronary artery which is rich in oxygen and it is the first to receive the blood. In heart diagram two coronary arteries are passed around the heart and that meet at the back side. The left coronary artery is supply blood to most of the lower chamber or left ventricle. The left ventricle is one of the most muscular and larger of the two ventricles and its main function is to pumping blood to all around the body.

human heart diagram

human heart diagram

Chamber of the heart

In heart diagram it was shown that heart contain four chambers. Those are right atrium, right ventricle, and left atrium, left ventricle. The atria is normally smaller then the ventricles and also thinner. They have less muscular walls than the ventricles. The atria are normally acts as a receiving chamber for blood and they are also connected into the vain that usually carry blood to the heart. Ventricles are larger and have strong pumping chambers that help to send blood out of the heart.

Physiology of the heart diagram

Coronary systole and diastole

  1. During systole the cardiac muscle tissue which is contracting to push blood out from the chamber.
  2. During diastole the cardiac muscle cell are relaxed that allow the chamber for fill with blood. Blood pressure increasing into the major arteries during the ventricular systole and blood pressure become decease during ventricular diastole. This condition is lead to them two number associate with the blood pressure, that is systolic blood pressure is the higher number and other hand diastolic blood pressure are the lower number. For example if a person’s blood pressure in 120/80 then it means that the systolic pressure is 120 and the diastolic pressure is 80.

Structure of the heart wall

In heart diagram it is shown that the hart is made of three layers. Those layers are endocardium, myocardium and epicardium.


The epicardium is outmost layer of the heart wall and it’s another name for the visceral layer of the pericardium. The pericardium is normally a thin layer of the serous member that protects the outside of the human heart and heart wall. Under the epicardium, the second thicker layer of the human heart wall is called myocardium.


The myocardium is the middle layer of the heart wall that usually contains the cardiac muscle tissue. It is part of the heart that are responsible for the pumping the blood. Myocardium makes up majority of the thick layer. Under the myocardium is the thin layer present that called endocardium layer.


It is the simple endocardium that line is present inside of the heart. The endocardium is very much smooth and that is responsible for the keeping blood from the sticking to the inside the heart and that forming potentiality deadly blood cloth.

The Electrocardiogram

The Electrocardiogram is also known as ECG or EKG. The Electrocardiogram is a non-invasive device that monitors and measures the electrical activity of heart through the skin. Normally the Electrocardiogram generates a distinctive waveform in response to the electrical alters taking place within the human heart.

The first or initial part of the wave is called P wave. This wave is a small increase in voltage of about .1 mV which is corresponds to the depolarization of atria during atrial systole. On the other hand the next part of the Electrocardiogram wave is the QRS complex that features a little drop in voltage (Q), a large voltage perk (R) and one more small drop into voltage (S). The QRS complex is corresponds to the depolarization of ventricles during ventricular systole. In human heart diagram the atria also repolarize during the QRS complex.

The final part of EKG is the T wave, is a small peak which follow the QRS complex. On the other hand the T wave usually represents the ventricular repolarization during relaxation phase of the cardiac cycle. The Variations in the waveform and also distance between the waves of EKG can be used clinically for diagnose the effect of heart attack.

The human heart: Blood

In average an adult has about 5 liters of blood are present inside of the body and coursing through their vessel, removing toxic waste and transferring essential elements. The human body would stop their working without blood. The blood is fluid of life that transporting oxygen from lung into the body tissue and carbon dioxide into the lung from the body tissue. Blood is a fluid of growth, that very important for transporting nourishment from digestion and also hormones from the glands throughout the whole body. Blood is a fluid of health which transporting the disease fighting chemical into the tissue and also waste to the kidney.

Because blood contains into living cells, so blood is alive. White blood cells and red blood cells are mainly responsible for the cleansing and nourishing the whole body. Since the body cells are alive, they must need nourishment. Minerals and vitamins are keeps our body healthy and well. The blood cells have a specific and definite life cycle like all living organism. Approximately fifty-five percent of blood is plasma. The blood plasma is straw colored clear fluid. Normally the liquid blood plasma carries the platelets and the solid cells that help to blood clot. You would bleed to death without blood platelets.

When the human bodies are loses a little bit blood by any minor wound or injury, then the platelets are help to blood for clot so that the bleeding prevents. Because new bloods are always being produce inside of our bones and the body can restore the lost blood. But when the human body’s are loses a huge amount of blood through a major injury, then blood has to be restore through a blood transfusion. But everyone blood is not the same group. There are 4 different types of blood and the blood has Rh factors that make it even more unique. You have to match your own blood with recipient before blood transfusion.


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