The Cardiovascular System
This week we learned about the Cardiovascular System is class. The Cardiovascular System also known as the Circulatory System is your heart and circulation of blood, that is why is it either called the cardiovascular OR the circulatory system. Because the system circulates blood, it can be called the circulation, see how both words have the word circul in them? it's not really a word but it stands for circle because the blood goes in circles. It can also be called the Cardiovascular system because every time you hear the word cardio, you know it has something to do with the heart.
It takes approximately half a minute for a single blood cell to circulate around the body. The rout of the blood is, oxygen poor blood comes into the heart through the interior vena cava and the superior vena cava which join into one to enter the heart then get pumped out through the pulmonary artery which absorbs O2 from the lungs the goes back to the heart through to pulmonary vein to get pumped into either the caroid artery to go to the head or arms then as O2 poor blood goes down the jugular vein which turns into the superior vena cava, or instead of going up the Caroid artery it goes down the Aorta which could feed into the mesenteric arteries witch feeds the digestive track and liver and goes back to the heart in the hepatic vein as O2 poor blood which feeds in to the interior vena cava, or the aorta keeps going straight where it could feed into the renal artery which gives O2 to the kidneys which feed the O2 poor blood into the renal vein which also feeds into the interior vena cava. Or the Aorta could keep going straight into the trunk and legs as the iliac artery still O2 rich blood then leaves the trunk and legs as O2 poor blood and through to the iliac vein which feeds into the interior vena cava.
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