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 HOW DOES BLOOD CIRCULATION OCCUR

 

Blood moves through the body in a kind of circle. This circular movement contributes to the name, "circulatory" system. The intricate network, made up of miles of arteries, veins and capillaries that carry nearly 5 liters of blood, is a simple way to move oxygen and nutrients around the body. The circulatory system is made up of three components working together: the heart (coronary circulation), the lungs (pulmonary circulation) and the blood vessels (systemic circulation). When a heart contracts and forces blood into the blood vessels, there is a certain path that the blood follows through the body. The blood moves through pulmonary circulation and then continues on through systemic circulation. Pulmonary and systemic are the two circuits in the two-circuit system of higher animals with closed circulatory systems.

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The circulatory system consists of the heart, blood vessels and blood. Blood vessels encompasses arteries, arterioles, veins and capillaries. All these parts play a major role in the normal functioning of the circulatory or cardiovascular system. The basic structure of the circulatory system can be considered as a closed loop that starts and finishes at the heart. For better understanding of the circulatory system, let's first discuss about the heart. 

Heart: The human heart is divided into four chambers - left atrium, left ventricle, right atrium and right ventricle. The ventricle walls are thicker and stronger as compared to the atria walls. The right atrium is the upper and right chamber that receives deoxygenated blood via the superior vena cava (for upper body) and inferior vena cava (for lower body). The left atrium collects the oxygenated blood from the pulmonary veins and is pumped into the aorta (biggest artery of the heart), to be distributed to arteries and arterioles. 

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The circulatory system consists of the heart, blood vessels and blood. Blood vessels encompasses arteries, arterioles, veins and capillaries. All these parts play a major role in the normal functioning of the circulatory or cardiovascular system. The basic structure of the circulatory system can be considered as a closed loop that starts and finishes at the heart

  The human heart is divided into four chambers - left atrium, left ventricle, right atrium and right ventricle. The ventricle walls are thicker and stronger as compared to the atria walls. The right atrium is the upper and right chamber that receives deoxygenated blood via the superior vena cava (for upper body) and inferior vena cava (for lower body). The left atrium collects the oxygenated blood from the pulmonary veins and is pumped into the aorta (biggest artery of the heart), to be distributed to arteries and arterioles.

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Here is the diagram of circulation of blood in humans:

and here is the heart:

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the blood circulate from heart to all part of the. blood forms from water . hence it help our body to work . the process start from water firstly water comes to heart then change in to red blood and many cells are form  such as whit blood cell , red blood cells . and from thes are body work 
 
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circulates from  heart to all parts of the body
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