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The Cardiovascular System Essay

1286 words - 6 pages

One of the most important systems in the body, keeping it alive, is the cardiovascular system. As a part of the circulatory system, the cardiovascular system pumps blood throughout the body through a network of many arteries and veins, providing it with nutrients and oxygen. Also, the cardiovascular fights infections and disease in the body and creates blood cells. Never the less, blood acts as a filtration system for the body and removes waste, cell debris, or bacteria from the bloodstream.

As blood travels through the circulatory system, it is first pumped from the right side of the heart to the lungs through the pulmonary arteries and then separates into arterioles which split into capillaries. Here, the deoxygenated blood receives oxygen diffused in the lungs due to large surface area and travel back through venules and then pulmonary veins to the left side of the heart. From here, the oxygen rich blood is pumped throughout the body in arteries, arterioles, and capillaries, providing the body and cells with nutrients through osmosis. Afterwards, the now deoxygenated blood travels back to the right side of the heart containing deoxygenated blood, through venules and vein to repeat the cycle over again. Also, the heart is nourished by coronary circulation through the Right and Left Main Coronary Arteries.

The body's blood consists of many components, red blood cells, white blood cells, plasma, and platelets. Red blood cells deliver oxygen to your body and remove waste. Without them, your body would slowly die. They contain a protein chemical called hemoglobin, which gives it it’s red color. Also, hemoglobin contains Iron, making oxygen molecules attach to it so as the blood passes through tissue, the oxygen is released into cells. After releasing the oxygen, the hemoglobin then bonds with the tissue’s carbon dioxide or other waste gases, transporting it away.The average life cycle of a red blood cell is around 120 days. White blood cells fight infections that enter the body. They can either produce antibodies that will overpower the germ, or the surround and devour the bacteria. Each cell generally lasts for as little as a couple days to weeks. Also, plasma is a straw colored clear liquid that is 90% water and carries blood cells through the body. It contains dissolved salts and minerals such as calcium, sodium, magnesium, and potassium. Also, it carries microbe-fighting antibodies to the disease in the body. Without plasma, blood cells would not be transported and therefore would not provide the body with nutrients and oxygen. Finally, When the body loses excessive amounts of blood, blood platelets along with mineral calcium, vitamin K, and fibrinogen form clots or “scabs” to stop the bleeding. Without these minerals and nutrients, it will take longer for the body to form a clot, causing you to bleed to death. A healthy diet can provide these required nutrients.

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