How Does Blood Circulate Through The Body and Heart

Quite simply stated, the blood circulates because is suppressed by heart that work as a pump. Arteries and veins are the tubes through which blood drives away. Blood flows and transfers the air from the lungs and nutrients from the body for digestion in other parts of the body, and take away carbon dioxide and unnecessary substances from the tissues.

Blood vessels are actually two pipe system, one of which is large and the other small. We call them big and small circulation. Both are associated with the heart, “pump”, but mutually these two systems are not connected. Small blood stream leading from the heart to the lungs and back, and big goes from the heart to the body and back again to the heart.

Blood vessels are called arteries, veins and capillaries. The arteries carry blood from the heart and veins is returning there. Capillary networks are the smallest blood vessels connecting the venous and arterial blood flow.

And now a word or two about the “pump” – the heart. It is comparable to a dual-building with two floors. Floor suite right and left atria, and the ground right and left chambers.

Blood circulation process

There are “doors” called valves between the atria and chambers on each side, but none between the two “houses”. Also, there are exit doors of both chambers leading to the arteries and entrance doors leading from the veins in the atrium. In a healthy heart, all the doors are closed, because the blood once pushed out of the heart, can not go back through the same hole. Valves open and close with each heartbeat. If we follow the path of blood throughout the body, we would observed the following: blood oxygen coming from the lungs into the left atrium (the “floor”). Thence passes into the left ventricle (the “ground”), and then into a large artery called the aorta. It with its “pipes” drains the blood into all the organs and body parts.

Through capillary blood goes from the smallest arteries in the least veins. From there it flows over larger and larger veins, and from the intestine, spleen and stomach passes first through the liver and finally to all the blood collected in the right atrium of the heart. From there, passes to the right ventricle and out of the artery leading to the lungs.

There, it releases carbon dioxide and certain amount of water, and instead takes the oxygen. Then it is ready to go back into the left atrium and the whole process starts over again.

Read also How Your Blood Works!