The Cardiovascular system
By Ethan Bradley-Foo
There are three components that make up the cardiovascular system. They are the blood vessels, the blood, and the heart. The cardiovascular system has two circulation routes. The pulmonary circulation is a loop in the lungs where your blood gets oxygen. The systemic circulation is another loop that goes through the body and spreads oxygenated blood around. The average adult has five to six quarts (about 4.7 to 5.7 liters) of blood, making about approximately 7% of their total body weight. Blood is made out of the plasma, which is the liquid the cells are floating in, the red blood cells, which carries the oxygen, white blood cells, which fight viruses and bacterial infections, and the platelets, which cause blood clotting.
The pulmonary circulation loops blood through the lungs to get oxygen and then back to the heart.The route of the pulmonary circulation is the route where deoxygenated blood leaves the heart, goes to the lungs, and goes back to the heart. This path first starts where deoxygenated blood leaves the heart,then it goes through the right ventricle, then straight through the pulmonary artery. then through the right atrium, the blood is pumped straight through the right atrioventricular valve (also known as the tricuspid valve), right into the right ventricle. Blood is then pumped from the right ventricle throughout the pulmonary valve straight into the pulmonary trunk inside the pulmonary artery.
Any diseases that appear inside the cardiovascular systems are defined as cardiovascular disease, and many of the cardiovascular disease are defined as lifestyle diseases because they take place over time. they are called lifestyle disease because the relate to the person's exercise habits, diet, if they smoke, and other lifestyle choices the person with the disease would make.
The systemic circulation is the circulation of blood to all of the parts of the body except the lungs. Systemic circulation is the area of the cardiovascular system that transports blood away from the heart through the aorta from the left ventricle where the blood has previously been "dumped" by pulmonary circulation, to the rest of the body, and returns oxygen-depleted blood back to the heart.
The brain has a duel supply of blood that comes from it's arteries from the front and back. They are called the "anterior" and "posterior" circulation.
The anterior circulation arises from the internal carotid arteries and supplies the front of the brain. While the posterior circulation arises from the vertebral arteries