What is the advantage of the circuit of fetal blood flow through the ductuos arteriosus?
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perhaps you might refer to wikipedia. I reserved extensively and thoroughly on the topic and can only find relevant information in wikipedia. Search under fetal blood flow.
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The Cardiovascular System\n\n\n The cardiovascular system and the lymphatic system form what is collectively called the circulatory system. Together, these systems transport oxygen, nutrients, cell wastes, hormones, and many other substances to and from all cells in the body. The trillions of cells in the human body take up nutrients and excrete wastes every minute of every day. Although the pace of this exchange may increase with activity or slow with rest, it happens continuously. If it stops, so does life. Of the two systems, the cardiovascular system is the primary transport operator; the lymphatic system aids it in its function.\n\n\nDesign: Parts of the Cardiovascular System\n\nCardiovascular comes from the Greek word cardia, meaning "heart," and the Latin vasculum, meaning "small vessel." The basic components of the cardiovascular system are the heart, the blood vessels, and the blood. The system can be compared to a large muscular pump (the heart) that sends a fluid (blood) through a series of large and small tubes (blood vessels). As blood circulates through the increasingly intricate system of vessels, it picks up oxygen from the lungs, nutrients from the small intestine, and .....
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If the thickness of the vessel wall is the same in both as well, then theorhetically you would get slightly  higher flow from the one 4mm vessel than the 2-2mm vessels since the one of the wall thicknesses is eliminated.
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it helps the arteries stay clear from fat so that your heart can pump blood to all of your body.
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The origin (beginning) of the heart arteries at the aorta (the big vessel your heart pumps directly into)
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Through veins, artilleries and capillaries powered by the pumping motion of the heart. \n☆
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Circulation of Blood..
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In fact it does, exercise helps blood flow to all body parts and that is the secret. Just don't exercise to death in order to be a jenius that wont happen ...lol
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The volume of blood flowing through the arteries is about the same as that flowing through the veins. It must be since it is a closed circulatory system. \nThe difference is in the internal diameter (lumen) of the vessels. The arteries have smaller lumen and more muscular structure, the veins have less muscle, are of less defined, larger lumen shape. Therefore blood flows slower in the veins, faster in the arteries, but the volume of blood is the same.
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electropneumatic circuit \n\nhttp://www.festo-didactic.com/ov3/media/customers/1100/0000607001156324537.pdf\n\n:>peace
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In the human anatomy, we have 2 atria and 2 ventricles.  The ventricle structure works like a bladder in a water pump to create the pressure to push the blood out into the circulatory system.  After the ventricle contracts and is empty, a supply of blood is needed to refill for the next contraction.  Think of the atrium as a bucket ready to dump into the ventricle.  It allows fast refill at low pressure.
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Let's just call it Blood Pathway =)\n\nfrom ur system (outside the heart) unoxygenated blood --> right atrium --> tricuspid valve ---> right ventricle ---> pulmonary artery --> lungs (oxygenates blood) ---> pulmonary vein (blood is already oxygenated) ---> left atrium --> bicuspid valve --> left ventricle ---> system (outside heart) \n\nthe cycle goes back... \n\nAlways remember that the atria are the receiving chambers of the heart while the ventricles are the pumping chambers of the heart.\n\nThere are three varieties of blood vessels: arteries, veins, and capillaries. During blood circulation, the arteries carry blood away from the heart. The capillaries connect the arteries to veins. Finally, the veins carry the blood back to the heart.
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Fetal animals do not yet use their lungs.  The pulmonary arteries (which go to the lungs) are therefore not as well developed.
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found this at the site below:\n\nMy only suggeston is start from the heart and work through ascending aorta, carotid and brachial arteries, descending aorta and its branches namely superior, middle and inferior gastrointestinal arteries, renal arteries, uterine areteries and iliac arteries and their branches the femoral arteries. For veins, start with heart and do superior vena cava and its tributaries the cerebral and arm veins and the lymphatic duct, then inferior vena cava and its tributaries the portal and hepatic veins, the renal veins, the gastrointestinal veins, the uterene veins and the femoral veins with their tributaries the superficial and deep saphenous veins. \n\nDavid Richardson
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Through our circulatory system or blood.
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A heart is a pumping station, circulating blood is its main function. The idea is to utilize its throbs,synchronise God's name within. The constant repetition of God's name produces God's light. The heart,being a pumping station circulates the Light-oriented blood all over the body. As a result of thisnot only does the heart get enlightened but also the whole body.
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Frogs have a three-chambered heart, consisting of two atria and a single ventricle. Blood leaving the ventricle passes into a forked aorta, where the blood has an equal opportunity to travel through a circuit of vessels leading to the lungs or a circuit leading to the other organs. Blood returning to the heart from the lungs passes into one atrium, while blood returning from the rest of the body passes into the other. Both atria empty into the single ventricle. While this makes sure that some blood always passes to the lungs and then back to the heart, the mixing of oxygenated and deoxygenated blood in the single ventricle means the organs are not getting blood saturated with oxygen. Still, for a cold-blooded creature like the frog, the system works well.