AJenniferCirculatory1

Circulatory System Structure and Function

Right and left atriums right and left ventricles aorta superior and inferior vena cava pulmonary arteries semi-lunar valves septum mitral, pulmonary, aortic, tricuspid valves ateries, veins, capillaries lungs - alveoli gaseous exchange oxygenated and deoxygenated blood blood blood types-A,B,AB,O blood cells (red and white)

Overview:

The four chamber of the heart (the right and left atriums and the left and right ventricles) contract to pump the blood through the heart. Deoxygenated blood first enters the heart through the superior and inferior vena cava and flows into the right atrium. Then the blood goes through the tricuspid valve into the right ventricle. The blood then goes through the pulmonary valve, through the pulmonary arteries, and to the lungs. In the lungs a gaseous exchange occurs and the blood becomes oxygenated. The blood goes from the lungs through the pulmonary arteries and into the left atrium. Next, the blood travels through the mitral valve into the left ventricle. Then, it flows through the aortic valve, through the aorta, and goes to the body. In the bloods travels through the human body, it goes through the arteries, capillaries, and veins. Finally, the process repeats. The function of the septum is to separate the right and left chambers of the heart. If the septum wasn't there, the the oxygenated and deoxygenated blood would mix. this would cause the gaseous exchange to occur in the heart and the body cells would not receive enough oxygen for cellular respiration to occur.

The main function of the circulatory system is cellular respiration. It brings the necessary oxygen to cells throughout the entire body and brings the waste back to the lungs where it is deposited back into the air. Without this process the cells in the body would not be able to go through the process of cellular respiration and we would die.





The most basic parts of the circulatory system are the lungs, heart, arteries, capillaries, veins, and blood. The structure of the heart is seen in the above image. It is broken into four chambers; the right atrium, the left atrium, the right ventricle, and the left ventricle. Blood enters the right atrium through the superior and inferior vena cava. Another important structure in the heart is the septum. There are also four valves; the tricuspid valve, the pulmonary valve, the mitral valve, and the aortic valve. We also see the pulmonary arteries and veins and the aorta. The main function of the heart is to pump blood to the rest of the body. It is an incredibly strong muscle that is constantly at work. The function of the valves is to move the blood from one chamber to the next while restricting any back flow. The septum may have one of the most important functions within the heart. The function of the septum is to separate the right and lefts sides of the heart, and thereby separate the oxygenated and deoxygenated blood. If the two were to mix, then the gaseous exchange would occur too soon. The blood would not absorb as much oxygen and therefore, the cells in the body would not receive as much oxygen. This would impair the body's ability to function properly. The lungs are made up of bronchial tubes and alveoli. It is in the alveoli that the gaseous exchange occurs. This is where the blood receives oxygen and deposits carbon dioxide. The function of the lungs in the circulatory system is to provide oxygen and dispose of carbon dioxide. The arteries, capillaries and veins serve similar functions. They are like the highway that transports the blood. Arteries carry oxygenated blood, veins carry deoxygenated blood, and the capillaries are where the gaseous exchange occurs that changes the blood from oxygenated to deoxygenated. Blood is made up of various things such as plasma, hemoglobin, red blood cells, and white blood cells. The hemoglobin is the structure that oxygen and carbon dioxide are carried on. The white blood cells are a defense mechanism of the body and the red blood cells are the carriers of hemoglobin.
 * Outline of System Parts, Structure, and Function:**

**Relation to other systems**
Blood absorbs the oxygen taken into the body through the respiratory system. Once the oxygen has been spread to the cells throughout the body, the blood then absorbs the carbon dioxide released from cellular respiration. Blood then carries the carbon dioxide back to the lungs where it is released back into the atmosphere through exhalation.
 * Respiratory System:**

The circulatory system is absolutely essential to the immune system. The circulatory system carries the white blood cells that are a part of the immune system. White blood cells attack foreign bodies in the body that can cause harm and make a person ill.
 * Immune System:**

The relationship between the skeletal and circulatory systems lies in the bone marrow. It is in the marrow that blood is created. If there was no blood, there would not be a way to transport oxygen to the body. Blood is absolutely essential to the circulatory system being successful. Therefore, the skeletal system is also essential to the circulatory system since it is the location of the production of blood.
 * Skeletal System:**

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