What are the functions of the organs in the circulatory system?

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megamind-616 eNotes educator| Certified Educator

The circulatory system is responsible for the transportation of blood within the body. This is important because blood drops off oxygen to cells. This oxygen is used during cellular respiration. Cellular respiration produces another gas called carbon dioxide. The blood also picks up the carbon dioxide to deliver it to the lungs so that it can be exhaled and eliminated from the body. Below are some of the organs that make up the circulatory system and their functions. 

Heart- The cardiac muscle of the heart provides the contractions needed to pump the blood through the veins and arteries so that blood can be transported. 

Arteries- Carry blood away from the heart. 

Veins- Carry blood to the heart. 

Capillaries- Capillaries are found between veins and arteries. Their semi-permeable characteristic allows the oxygen to be delivered to the cells. At the same time, carbon dioxide and wastes are picked up by the blood that enters the veins. In this way, capillaries are able to exchange food, waste, and gases through diffusion 

alishat23 | Student

The circulatory system is composed of three major organs: the heart, the lungs, and the blood vessels. The heart is responsible for keeping the blood flowing and pumping. Blood enters the right atrium and continues through the right ventricle to travel to the lungs. From the lungs it enters the left atrium and is pumped back into the body with the left ventricle. The heart constantly keeps the blood moving.

The lungs are important as they oxygenate your blood. Blood enters the lungs and releases the carbon dioxide when you breath out, and oxygenates the blood from the breathes you take in. 

The blood vessels transport your blood to the different areas of your body and back up to the heart. 

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