Understanding the fundamentals of the circulatory system is an important step towards gaining knowledge on how the human body works. We depend on our circulatory system to cart nutrients and oxygen to our blood cells, and to flush out waste and carbon dioxide. The vital multifarious organs in our bodies comprises of the heart, the blood, and the blood vessels.

The heart is a muscular organ that essentially works as a pump. In the heart, there are four chambers – the right atrium and ventricle, and the left atrium and ventricle. There are four valves dividing the chambers to keep the blood running in the right track. The right side of the heart is accountable for receiving deoxygenated blood from the body and propelling it to the lungs. The left side collects this oxygen-enriched blood from the lungs and passes it all along the body to keep the circuit running.

The heart usually beats about 72 times each minute. There is a unique set of cells that makes electrical indication, which gives a signal to the heart when it should beat. These cells indicate the electrical pulses more than once per second. The main supply of the electrical indication is called the senatorial node. Both the right and left atria beat simultaneously at this first indication. Next, it passes through to the atrioventricular node, which sends the pulse to the left and right ventricles, so they beat at the same time. This interruption between the chamber pumps is why the heart beat makes a typical sound.

The circulatory system is complex in nature. The liquid matter that carries nutrients and waste around the body is the blood. It is chiefly composed of red blood cells, which makes the most of hemoglobin to transmit oxygen to cells. Blood is also made of white blood cells, which toil to guard the body from disease. T and B lymphocytes occupy the blood and are accountable for resistance. Platelets work to close up wounds, and plasmas are made of proteins that work to maintain a constant volume of blood, among other things.

The heart pumps the blood through blood vessels. There are two types of vessels, arteries and veins. The arteries transmit oxygenated blood from the heart throughout the body. Veins provide a corridor for deoxygenated blood to return to the heart so that it can be re-enriched with oxygen. There are three major kinds of veins. Superficial veins exhausts into communicating veins, which deposit their contents into deep veins. Deep veins help in carrying back the blood to the heart.

Veins, like the heart, depend on valves to let the blood flow in the correct course. However, we develop venous diseases like varicose veins when these valves fail to function in order. Due to this reason other smaller, superficial veins eventually lose their power to keep blood flowing correctly, thus resulting in pooling of old blood. This can be painful. You need to check out with a vein specialist. The circulatory system helps to perform our daily chores with ease.