How Does The Circulatory System Work ?

How Does The Circulatory System Work ?

The main work of the circulatory system is to take nutrients and oxygen to all parts of the body. It is able to do so with the help of the blood and the heart, which pumps the blood.  Blood is circulated via the blood vessels, which are made up of arteries and veins. Arteries carry oxygenated blood, and veins carry deoxygenated blood.

Also, it is a closed system. That means the blood is circulated in a continuous flow to and from the heart. 

There are two types of circulation -- the systemic circulation and the pulmonary circulation. 

In the systemic circulation, arteries take the oxygenated blood from the heart to the various tissues in the body. Then the blood takes the waste products, namely carbon dioxide, from the tissues. 

The pulmonary circulation is where the blood is circulated from the heart to the lungs and back again to the heart. The right ventricle pumps deoxygenated blood into the two pulmonary arteries, which take it to the lungs. In the lungs, the deoxygenated blood gives its carbon dioxide to the alveoli and takes oxygen from them. It is now oxygenated, and is taken back to the heart. The right atrium now receives this blood from the pulmonary veins. 

Now, it is the work of the systemic circulation to distribute this oxygen to the rest of the body. 

Also, the heart works in two phases -- the systole and the diastole. One systole and one diastole will complete one heart beat. When the ventricles contract, they are in the systole phase. In this phase, the blood is pumped for systemic circulation. The heart is said to be in the diastole phase when the ventricles relax. When the ventricles relax, blood fills the atria. 

This is how the circulatory system works.

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How Does The Circulatory System Work