Our circulatory system contains three main parts -- the heart, the blood and blood vessels such as the arteries, capillaries and veins. The heart makes our body function properly by pumping blood to the various parts of our body. The main function of this system is to provide oxygen and nutrients to the various cells in the body. It carries carbon dioxide and waste materials away from the cells. An interesting fact about the circulatory system is that the blood which moves towards the heart has a high degree of carbon dioxide and the blood flowing away from the heart is rich in oxygen. Blood vessels are categorized into three major types -- arteries, capillaries, and veins. Arteries carry blood away from the heart, veins carry blood towards the heart and it's the capillaries where the nutrients are mixed into the blood.
The functioning of the circulatory system is also pretty fascinating. The heart pumps blood, which is sent to the four chambers of the heart. The heart has two ventricles and two atria. The left ventricle pumps oxygenated blood to the other organs of the body; on the other hand, the right ventricle pumps blood to the lungs. The heart has four valves which control the flow of the blood. The right atrium contains blood that is low in oxygen. When the valve opens, this blood is pumped into the right ventricle; similarly another valve opens to pour the blood into the pulmonary artery which carries the blood to the lungs for oxygen. The left atrium brings oxygenated blood into the left ventricle via another valve and into the aorta, which then sends the blood to the other body parts.
Listed below are some interesting facts that will help you know your circulatory system better.
Remember, our heart is a muscle and like any other muscle, it too needs exercise to be healthy and free from problems and diseases. Ride a bicycle or go for a swim, your body will thank you for it! I have always admired the circulatory system, and the way in which it keeps on going, it deserves to be taken care of. So start by eating a good deal of fruits and vegetables, whole grains and low-fat dairy products, and quit smoking as it damages the heart and blood vessels, and then you're good to go!