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Heart |
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The heart pumps blood through all of our arteries and veins Blood circles through our body, through the bodies of all mammals. |
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With this circulatory system our body gets its nutrients, gets hormones, liquids. Repair cells are transported to damages, ? oxygen filled red blood cells bring energy to muscles, and a big part to our brain! In red you see the arteries transporting oxygen, in blue you see veins, blood with low amounts of oxygen. moving back towards the heart, than into the lungs. Look at all the arteries and veins! Imagine 60000 miles of bigger and smaller pipes in every human body! That is about 2 times around our globe ... our muscle engine heart has to work 24/7 every day of the year every day as long as we live! |
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If we would drain all the blood out of an adult human body about 5 liters = 5.3 US-quarts of blood would be in our bucket. |
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The most important connection: The heart pumps blood to the lungs to enrich it with oxygen, and to get rid of the carbon dioxide CO2 |
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That's the way blood ingredients are pumped through our blood vessels Our heart transports blood enriched with oxygen and other ingredients Blood brings nutrients to every cell in our body. Blood takes the oxygen while been pumped through our lungs. |
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Our heart - a strong muscle around a shell, pumping blood, quart by quart, as long as we live ... Our heart has four cavities that fill with blood. Doctors call these two cavities atria, the other two cavities are named ventricles. The two atria form the curved top of the heart. The left ventricle contracts most forcefully! Between the two halves is a wall, called the septum, separating the right and left sides of the heart. For a connection the mitral valve and the aortic valve, normally a tricuspid, what means with three leaflets, valve opens and closes. On the top of our heart large blood vessels start the transport. The largest is the aorta, also called main artery, which carries nutrient-rich blood away from the heart. The other very important vessel is the pulmonary artery which connects the heart with the lungs as part of the pulmonary circulation system. |
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Here you see a very small artery, just big enough for the red blood cells. Inside the arteries blood is transported away from the heart full of oxygen enriched later with nutrients, hormones |
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