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About The Cardiovascular System
The cardiovascular system includes the heart and the blood vessels( veins, arteries and capillaries). It delivers blood to each and every cell of the body. Everyday approximately 5 litres of the blood are circulated by the heart. Our bodies have two types of circulatory systems:-
1) Pulmonary circulatory system:- Circulations from the heart to the lungs and back again.
2)Systematic circulatory system:- Circulation from the heart to all the other organs and back to the heart again.
The cardiovascular system includes the heart and the blood vessels( veins, arteries and capillaries). It delivers blood to each and every cell of the body. Everyday approximately 5 litres of the blood are circulated by the heart. Our bodies have two types of circulatory systems:-
1) Pulmonary circulatory system:- Circulations from the heart to the lungs and back again.
2)Systematic circulatory system:- Circulation from the heart to all the other organs and back to the heart again.
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The Heart
The heart is a muscular organ located on the left side of the thoracic cavity and is the size of our fist. It circulates blood around the body. Deoxygenated blood enters the right atrium of the heart through the superior and inferior vena cava. It then goes to the right ventricle through the tricuspid valve. From the tricuspid valve, the blood leaves the heart through the pulmonary artery and goes to the lungs to get oxygenated. Once the blood is oxygenated, it comes back to the heart through the pulmonary vein and enters the left atrium. From the left atrium, it goes to the left ventricle via the bicuspid valve. And the blood again leaves the heart through the aorta to go to different organs. Since the blood enters the heart twice during the circulation, this process is also known as double circulation of blood.
The heart is a muscular organ located on the left side of the thoracic cavity and is the size of our fist. It circulates blood around the body. Deoxygenated blood enters the right atrium of the heart through the superior and inferior vena cava. It then goes to the right ventricle through the tricuspid valve. From the tricuspid valve, the blood leaves the heart through the pulmonary artery and goes to the lungs to get oxygenated. Once the blood is oxygenated, it comes back to the heart through the pulmonary vein and enters the left atrium. From the left atrium, it goes to the left ventricle via the bicuspid valve. And the blood again leaves the heart through the aorta to go to different organs. Since the blood enters the heart twice during the circulation, this process is also known as double circulation of blood.
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Veins Vs Arteries
Veins carry blood to the heart. They generally contain deoxygenated blood ( except pulmonary vein). Veins are made up of thin walls since the blood does not flow with great pressure. They contain valves which makes the blood flow in one direction.
Arteries carry blood away from the heart and they usually contain oxygenated blood( except pulmonary artery). They are made up of thick walls since blood gushes out with great pressure from the heart to be distributed to the entire body.
Veins carry blood to the heart. They generally contain deoxygenated blood ( except pulmonary vein). Veins are made up of thin walls since the blood does not flow with great pressure. They contain valves which makes the blood flow in one direction.
Arteries carry blood away from the heart and they usually contain oxygenated blood( except pulmonary artery). They are made up of thick walls since blood gushes out with great pressure from the heart to be distributed to the entire body.
Image and video references:-
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https://www.youtube.com/watch?v=mDSFxcf2UgQ
cardiovascular.png
data:image/jpeg
https://www.youtube.com/watch?v=mDSFxcf2UgQ