Table of ContentsThe Cardiovascular SystemThe HeartBlood VesselsBlood CirculationThe Cardiovascular SystemThe cardiovascular system is a major part of the body and is not appreciated as much as it should be. The movement of blood is called cardiovascular system. The main components of the system are the heart, blood vessels and blood. It is made up of a cardiac cycle known as the movement of blood between heartbeats. However, there are 3 types of blood vessels including arteries, veins and capillaries. These components help deliver oxygen and nutrients to all parts of the body. Say no to plagiarism. Get a tailor-made essay on “Why Violent Video Games Should Not Be Banned”? Get the original essay Blood flows out of the heart into the arteries. As blood circulates, it distributes all the nutrients and oxygen to different parts of the body. While releasing all of this, it also absorbs all the bad toxins and carbon dioxide. The blood then returns through the veins to the lungs so that more air is carried through the blood before returning to the heart. This process repeats itself continuously and without fail. The heart The heart is the size of an adult's fist and is made of cardiac muscle. The heart muscle is used to control the contractions of the heart. The heart is the main function that helps the cardiovascular system function properly. The heart is a muscular pump that pumps blood throughout the body. It contains 4 bedrooms; the two atria collect blood and the two ventricles pump blood away from the heart. The septum separates the right side from the left side. The heart consists of an electrical pacemaker that helps maintain a regular heartbeat. Blood Vessels Arteries transfer oxygenated blood from the heart and carry it to organs and cells. There are 3 main arteries, they are called left artery, right artery and circumflex artery. They have a thick, elastic muscle wall that stretches when blood flows through it. The left artery supplies the left side of the heart chambers. The right artery supplies blood to the upper and lower right sides of the heart. The circumflex artery distributes blood toward the back of the heart. They have thick muscular walls that contain small passages allowing blood to pass through the arterioles. Arterioles control blood supply by changing their size. They are made of a thick layer and have a high percentage of smooth muscle. They help control blood flow to the capillaries. Capillaries are known as the smallest blood vessels, they are narrow and thin to allow red blood cells to flow down single file, their narrow and thin walls help the capillaries to carry out their function. Oxygen, carbon dioxide, nutrients and wastes are exchanged through the capillary walls. The main function of the vein is to return deoxygenated blood to the heart. When muscles move, they squeeze the veins running through them. The veins contain a series of one-way valves, and when they are crushed, blood is pushed through the valves, which then close to prevent reflux. The vein has 3 different layers, the outer layer is called the outer tunic (connective tissue), and it is known as the thickest layer. The middle layer is known as the Tunica Media, which is a thin layer of smooth muscle squashed between layers of loose connective tissue. The last layer is the Tunica intima, this layer is made up of one-way valves that allow blood to flow back towards the heart. Keep in mind: this is just one..