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zuhair rizvi

on 27 October 2012

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THE CIRCULATORY SYSTEM PARTS OF THE HEART: The heart is a muscle that is used to pump blood all around your body.There are 2 types of blood.Their is red blood which has fresh oxygen and blue blood which has carbon dioxide.Red blood and blue blood exit and enter the heart.Parts in the heart help direct and let blood go to their destination.The upper vena cava carries blue blood to your heart from the upper body.The lower vena cava carries blue blood to your heart from the lower part of the body.The right atrium is a chamber that fills up with blue blood from the whole body.The right ventricle is a chamber that fills up with blue blood and pumps the blood throught he pulmonary artery and then to the lungs.The 4 valves in your body help your blood flow in the proper direction.The pulmonary artery carries blue blood from the heart to the lungs.The pulmonary vein carries red blood from the lungs to the heart.The left atrium fills up with red blood which is from the lungs.The left ventricle pumps red blood through the aorta and then to the body.The aorta is the largest artery that carries red blood to the body.The heart muscle is a really powerful muscle that squeezes blood out during the heart beat. WHY I CHOSE THIS SYSTEM: FACTS Some facts are that 1. The heart is located between the lungs on the left side. 2. The 4 valves are called the pulmonary valve, the aortic valve, the tricuspid valve and the mitral valve. 3. Their are about 100,000 km of blood vessels in your body. 4. The heart is the only organ that never rests. 5. The red blood cells main job is to carry oxygen to the tissue cells. 6. The human heart beats about 72 times per minute. 7. In females the heart weighs about 250 to 300 grams and in males it weighs about 300 to 350 grams. I chose this system because I thought it was more important than the respiratory and digestive system.The respiratory system is important because it's how we breath and without it we couldn't live and breath.Also like the respiratory system the digestive system is very important.Without the digestive system we could not get energy and nutrients from food and water.All the waste in our body could not be thrown out.But the circulatory system does a lot and works with the respiratory and digestive system.Blood takes oxygen from the lungs and gives it to the tissue cells.Blood carry's oxygen and carbon dioxide.Without the heart beat we wouldn't be able to digest our food properly.Nutrients from foods such as tomatoes make the heart better and build more blood.The circulatory system is a system that works by itself.You don't need to tell your heart every day to beat.This is called the autonomic nervous system which helps the heart to work by itself. HEART ATTACK: A heart attack is a disease and happens when the blood clots up causing you to die.Another way people get heart attacks is when the heart muscle is damaged.Symptons of getting a heart attack are vomiting, fainting, a lot of sweating, coughing, shortness of breath and dizziness.You never know when a heart attack can occur.When your sleeping or after you play some sports etc.Heart attacks can feel like your heart getting squeezed or something heavy on your chest.I f your valves are not working properly you are in the risk of having a heart attack because blood will clot up very fast. CIRCULATION: Blue blood starts by coming through the lower vena cava and the upper vena cava.When the blue blood through here it goes to the right atrium.To get to the right ventricle the blue blood has to go through the tricuspid valve.It is one f the 4 valves in your heart.After going through the tricuspid valve blue blood enters the right ventricle.Then it goes through the 2nd valve which is the pulmonary valve and then through the pulmonary artery which leads to the lungs.The blue blood picks up oxygen and then becomes red blood.From the lungs red blood goes through the pulmonary vein and then to the left atrium.To get to the left ventricle red blood has to go through the 3rd valve which is the mitral valve.When the red blood gets in the left ventricle it has to go through the 4th valve to get to the aorta.The 4th valve is the aortic valve.Once the blood gets to the aorta it goes and delivers oxygen to the tissue cells around the body.When the blood comes back the process starts all over again. Questions: Some questions I want to ask are 1. What are some heart diseases. 2. Does the heart grow as we grow. 3. What is the heart made of. 4. How many veins are in our body. 5. What cells protect the heart from disease. THANKS FOR WATCHING
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