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The blood vessels are an important part of the circulatory system and one major important role they play is helping to carry things like oxygen throughout the body. There are more than one type of blood vessels which are:

Arteries which carry blood to the organs and body from the heart

Veins- Which help carry blood to the heart

Capillaries- which help remove waste and also help to carry oxygen into the cells

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The heart has 4 heart valves all which help the heart to make sure the blood flow in the correct direction which are: mitrial valve, tricuspid valve, aortic valve and pulmonary valve.

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The heart has 4 room like chambers. two chambers are located in the upper side of heart while the other two are located in the lower area of the heart. The upper chambers are called atrium chambers and the lower chambers are called the ventricles. The atriums receive the blood while the lower ventricles pump the blood away to the body

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The septum has two parts which divides the heart, one is called atrial septum while the other is called ventricular septum. Which is muscular wall that basically separates the ventricles and atria of the heart from mixing of blood like oxygenated from deoxygenated.

There are three layers of the heart: Epicardium, Myocardium, Endocardium all which help protect the heart

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From the right atrium the blood moves into the right ventricle which is like a pumping chamber.

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the blood is then pumped out of the heart by pulmonary artery

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blood travels through the pulmonary artery and reaches the lungs and in there it gets rid of the wastes and gets fresh oxygen

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it enters the pulmonary veins which then enters the left atrium.

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which then moves to the left ventricle and after that in moves to the aorta tube

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he aorta leads to the body which then the blood delivers all the nutrients through the body

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after the oxygen and nutrirnts are delivered through the body the blood becomes deoxygenated so then it travels back to the heart through the superior and inferior vena cava veins which starts the process again

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then the blood goes to the right atrium

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blood without oxygen from the body enters the inferior and superior vena cava