What is the difference between "open" and "closed" circulatory system?
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Humans have a closed circulatory system.  It is when the blood is contain in the veins and arteries.  Where the arteries take blood to the body and the veins take it directly back.  In an open system the heart pumps blood out into an open area where the blood just flows over the different body parts and then comes back to the heart on its own.  An open circulatory system is extremely inefficient and a lower form of evolution.
260267
>Insects have an open circulatory system.\nAn open circulatory system is an arrangement of internal transport present in some invertebrates like mollusks and arthropods in which circulatory fluid in a cavity called the hemocoel bathes the organs directly and there is no distinction between blood and interstitial fluid; this combined fluid is called hemolymph (also spelled haemolymph). Muscular movements by the animal during locomotion can facilitate hemolymph movement, but diverting flow from one area to another is limited. When the heart relaxes, blood is drawn back toward the heart through open-ended pores.\n\n'Hemolymph fills all of the interior (hemocoel) of the body and surrounds all cells.\n\nHemolymph is composed of water, inorganic salts (mostly Na+, Cl-, K+, Mg2+, and Ca2+), and organic compounds (mostly carbohydrates, proteins, and lipids). The primary oxygen transporter molecule is hemocyanin.\n\nThere are free-floating cells, the hemocytes, within the hemolymph. They play a role in the arthropod immune system.
853184
Through our circulatory system or blood.
1057994
this may not be the answer you are looking for... but here it is anyway...\n\nthe respiratory system involves providing oxygen for the body. You inhale air which is made of different gases and your lungs absorb oxygen out of the air and you exhale the stuff that isn't absorbed. Oxygen is needed for burning fuel. Every single cell (trillions of them) need this oxygen you just inhaled. How does it get to every single blood vessel? you guessed it! the Circulatory system \n\n... the oxygen rich blood goes to the heart. .. and with every beat gets pumped out in all different directions all over the place and then once the oxygen has been delivered, the spent blood comes back for a refill... this happens many many times per minute. \n\nnow, all this blood would go nowhere without a heart. What is a heart essentially? a big strong muscle that goes and goes and goes for 80 years or more without ever stopping! in addition to this, every move you make, helps blood flow. especially walking, your feet act like mini pumps cuz you step on one foot the blood gets pushed around and then you step on the otehr foot as you walk and it goes on. \n\nAnd of course the nervous system. This has instructions directly form mission control ... your brain. It controls your heart speed, breathing speed, blood flow to different parts of the body depending on which part needs how much at what time and everything. None of these systems could normally work without the other one ... but if your nervous system goes down, your pretty much a vegetable. \n\nI know I just explained what all these different systems do but hopefully it helps you understand better.
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An open-tube manometer is one made from a tube open at both ends.  A closed-tube manometer has one end sealed off.\n\nBoth will have some sort of fluid contained within to delineate the pressure differential between the two ends of the manometer.\n\nGo to this page for an illustration of an open-ended manometer: \nhttp://www.efunda.com/formulae/fluids/manometer.cfm\n\nTry this one for an example of a closed-end manometer:\nhttp://www.upscale.utoronto.ca/PVB/Harrison/Manometer/Manometer.html\n\nAnd here's another one comparing the two:\nhttp://humboldt.edu/~scimus/Instruments/Manom-Duff/ManomDuff.htm
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Foramen Ovale\n\nThe foramen ovale remains open during fetal development to allow blood from the venous system to bypass the lungs and go to the systemic circulation. This is because prior to birth, the oxygenation of the blood is via the placenta and not the lungs. A layer of tissue begins to cover the foramen ovale during fetal development, and will close it completely soon after birth. After birth, the pressure in the pulmonary circulation drops, and the foramen ovale closes. In approximately 30% of adults the foramen ovale does not seal over.
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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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I would say both... An Aneurysm is the dilitation of the wall of an artery, vein or heart. When aneurysms grow too large, they can rupture and the bleeding can be life threatening. The Aorta is the large artery leaving the heart. All blood pumped out of the left ventricle travels through the aorta on its way to other parts of the body.
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The heart is a fist-sized, muscular organ that pumps blood through the body. Oxygen-poor blood enters the right atrium of the heart (via veins called the inferior vena cava and the superior vena cava). The blood is then pumped into the right ventricle and then through the pulmonary artery to the lungs, where the blood is enriched with oxygen (and loses carbon dioxide). The oxygen-rich (oxygenated) blood is then carried back to the left atrium of the heart via the pulmonary vein. The blood is then pumped to the left ventricle, then the blood is pumped through the aorta and to the rest of the body. This cycle is then repeated. Every day, the heart pumps about 2,000 gallons (7,600 liters) of blood, beating about 100,000 times. enchantedlearning.com
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draw a diagram of the system and where the blood goes when it goes in the heart etc. like show how it first goes into the right atrium than right ventricle than pulminary arteries then to the lungs to get oxygen then it travels back into the heart using the pulminary veins then its inside the left atrium then it goes through a valve into the left ventricle than to the aorta than to the rest of the body
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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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http://en.wikipedia.org/wiki/Circulatory_system
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a closed system has the ability to return information to the begining, it can have inputs and outputs as long as something returns to start the cycle over\n\nfirst sign of intelligence, see,think,do,feedback
76097
blood, fluid pumped by the heart that circulates throughout the body via the arteries, veins, and capillaries (see circulatory system; heart). An adult male of average size normally has about 6 quarts (5.6 liters) of blood. The blood carries oxygen and nutrients to the body tissues and removes carbon dioxide and other wastes. The colorless fluid of the blood, or plasma, carries the red and white blood cells, platelets, waste products, and various other cells and substances
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"Arteries are muscular vessels that carry blood away from the heart to the tissues and organs of the body (The vessels which return blood to the heart are veins)."\n\n"Capillaries are the smallest of a body's blood vessels, measuring 5-10 μm. They connect arteries and veins, and most closely interact with tissues."
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cardiovasular system, pumps the blood for circulation.
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The Circulation of Blood\n\nThe human circulatory system is really a two-part system whose purpose is to bring oxygen-bearing blood to all the tissues of the body. When the heart contracts it pushes the blood out into two major loops or cycles. In the systemic loop, the blood circulates into the body’s systems, bringing oxygen to all its organs, structures and tissues and collecting carbon dioxide waste. In the pulmonary loop, the blood circulates to and from the lungs, to release the carbon dioxide and pick up new oxygen. The systemic cycle is controlled by the left side of the heart, the pulmonary cycle by the right side of the heart. Let’s look at what happens during each cycle:\n\nThe systemic loop begins when the oxygen-rich blood coming from the lungs enters the upper left chamber of the heart, the left atrium. As the chamber fills, it presses open the mitral valve and the blood flows down into the left ventricle. When the ventricles contract during a heartbeat, the blood on the left side is forced into the aorta. This largest artery of the body is an inch wide. The blood leaving the aorta brings oxygen to all the body’s cells through the network of ever smaller arteries and capillaries. The used blood from the body returns to the heart through the network of veins. All of the blood from the body is eventually collected into the two largest veins: the superior vena cava, which receives blood from the upper body, and the inferior vena cava, which receives blood from the lower body region. Both venae cavae empty the blood into the right atrium of the heart.\n\nFrom here the blood begins its journey through the pulmonary cycle. From the right atrium the blood descends into the right ventricle through the tricuspid valve. When the ventricle contracts, the blood is pushed into the pulmonary artery that branches into two main parts: one going to the left lung, one to the right lung. The fresh, oxygen-rich blood returns to the left atrium of the heart through the pulmonary veins.\n\nAlthough the circulatory system is made up of two cycles, both happen at the same time. The contraction of the heart muscle starts in the two atria, which push the blood into the ventricles. Then the walls of the ventricles squeeze together and force the blood out into the arteries: the aorta to the body and the pulmonary artery to the lungs. Afterwards, the heart muscle relaxes, allowing blood to flow in from the veins and fill the atria again. In healthy people the normal (resting) heart rate is about 72 beats per minute, but it can go much higher during strenuous exercise. Scientists have estimated that it takes about 30 seconds for a given portion of the blood to complete the entire cycle: from lungs to heart to body, back to the heart and out to the lungs.\n\n^_^