why are the left and right ventricles different sizes?
401322
There is increased resistance associated with the left ventricle due to the larger volume of blood and capillary beds in the whole body vs. just the lungs for the right ventricle.
372359
The heart is located in the thoracic cavity between the lungs. If you were to draw a vertical line down the center of the chest, you would find that about two-thirds of the heart is on the left and one third on the right. The pointed end of the heart points to the left. So we can say that the heart is mostly on the left side.
127328
It is controlled by the Knueter Valve which is located above the left ventricle. Also through expansion, and contraction of cappilaries and veins.
278754
I believe the primary reason for the slow development of the artifical heart is the power pronblem.\n\nThe human heart is a very ppowerful pump.  It has been very difficult to creat something small enough to fit in the space where the heart is located and still provide the same power curve that the normal human heart displays.\n\nEarly artifical hearts were powered externally (outside the body).  Later artifical hearts were powered internally but the pumping action was ;icated outside the hearst compartment.\n\nMy explantion above is my own personal knowledge, here is a link that might help...\n\nhttp://en.wikipedia.org/wiki/Artificial-heart\nhttp://www.chron.com/content/chronicle/metropolitan/heart/heart-history.3-0.html\nhttp://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6729956&dopt=Abstract\n\n\nI hope this gives you a good start.\n\nBest of luck,\nJeffrey
782029
The right side of the heart is for pulmonary circulation. this is to take blood from the tissues rich in co2 and lower in Oxygen and circulate it thru the lungs. In the lungs the co2 is dumped off and a fresh load of oxygen is picked up by the hemoglobin in the red blood cell. The left side of the heart now gets this fresh blood and the left ventricle pumps blood thru the body but not the lungs. the right ventricle pumps blood thru the lungs.
215393
the lower chambers of the heart are called ventricles
508331
Right atrium, left atrium, right ventricle, and left ventricle.  The atriums are on the lop left and right sides of the heart, and the ventricles are on the bottom left and right portion.  Unoxygenated blood coming from the parts of the body goes into the right atrium, then via a valve to the right ventricle, then out to the lungs to become oxygenated.  It then comes back from the lungs to the left atrium, to the left ventricle through another valve then back out to the parts of the body again.
429685
That's not necessarily true. It kind of depends on what side of your body you use most. Right-handed people tend to work the right side of their bodies more than the left side. So the right right side has slightly more muscle than the left therefore it's bigger. I'm right-handed, but I use my left hand for colorguard, rifle team and billiards, so my left forearm and hand are larger than my right. And, then again, humans aren't perfect. God (if you believe in Him) made us this way. No two things are exactly the same.
589435
It is indeed the tricuspid valve. It is one of the Atrioventricular valves named so because of the location between the Atria of the heart and the ventricles. The tricuspid valve is the valve between the right atria and the right ventricle. Its job is to prevent blood flow from the right ventricle back into the right atrium, when the right ventricle is contracting. In your case there is some blood making its way backwards into the right atrium, this is not normal. It means that your valve has some degree of incompetence, Likely you have a murmur. If it is not large your doctor may just decide to leave it alone, if it gets worse or it is large now then the only fix is to have a valve replacement. The good news is that the current valve technology is excellent.
16005
The body's circulation has two parts, with the heart acting as a double pump. Blood from the right side pump is dark red (bluish) and low in oxygen. It travels along pulmonary arteries to the lungs where it receives fresh supplies of oxygen and becomes bright red. It flows along pulmonary veins back to the heart's left side pump.\n\n \n\n \n\n\nBlood leaves the left side of the heart and travels through arteries which gradually divide into capillaries. In the capillaries, food and oxygen are released to the body cells, and carbon dioxide and other waste products are returned to the bloodstream.The blood then travels in veins back to the right side of the heart, and the whole process begins again.
791319
look at the noted citation\n \n   \nWhat Is ...  \nHow the Heart Works  \nCauses  \nSigns & Symptoms  \nDiagnosis  \nTreatments  \nLiving With  \nKey Points  \nLinks  \n \n    What Is Atrial Septal Defect? \nAn atrial septal defect (ASD) is a hole in the wall (septum) that separates the two upper chambers (atria) of the heart. The defect allows blood to flow from one atrium to the other, usually from the left side to the right side. This causes extra blood flow:\n\nIn the right atrium \nIn the right ventricle \nTo the lungs \n\n\nFigure A shows the normal anatomy and blood flow of the interior of the heart. Figure B shows a heart with an atrial septal defect, which allows oxygen-rich blood from the left atrium to mix with oxygen-poor blood from the right atrium. \n\nIn a normal heart, oxygen-poor (blue) blood returns from the body to the right atrium. From the right atrium, the blue blood flows to the right ventricle—one of the two lower chambers of the heart—and is pumped to the lungs to pick up oxygen. After traveling through the lungs, the blood is now oxygen-rich and red. The red blood returns from the lungs to the left atrium and goes to the left ventricle, where it is pumped to the body. The right and left sides of the heart are normally completely separated by the septum. The septum keeps the blue blood from mixing with the red blood. The later section "How the Heart Works" explains the process in greater detail.\n\nASD is the second most common congenital heart defect.\n\nMore than 3,000 babies are born with ASD each year in the United States. \nASD occurs twice as often in girls as in boys. \nEffects of Atrial Septal Defect\nOver time, the extra blood flow to the right side of the heart and the lungs can cause:\n\nEnlargement of the right atrium and the right ventricle. \nRight heart overload. The right side of the heart has to work harder to pump extra blood to the lungs, especially as resistance in the pulmonary (PULL-mun-ary) artery increases. Over time, the heart may become overworked, and function may become impaired. This is exceedingly rare with modern methods of diagnosis and treatment. \nIrregular heartbeats or rhythms (arrhythmias). Extra blood flowing into the right atrium through the ASD can cause the atrium to stretch and enlarge. When this occurs, a fast heartbeat can develop with symptoms such as dizziness, fainting, or chest discomfort. \nStroke. Occasionally a blood clot in a vein or in the right side of the heart can pass through the ASD and enter the blood stream, where it can block an artery supplying the brain and cause a stroke. \nPulmonary artery hypertension. This is when high blood pressure exists in the arteries that carry blood to the lungs. The extra blood being pumped to the lungs can increase the pressure in the pulmonary arteries. Over time, high pressure can damage the arteries and the small blood vessels in the lungs. They thicken and become stiff, making it harder for blood to flow through them (pulmonary vascular disease). \nUsually, most of these effects don’t show up until adulthood, often around age 30 or later. They are rare in infants and children.\n\nCharacteristics\nAn ASD is classified by its size and location.\n\nSize\nThe size of an ASD can range from small to large.\n\nMost small defects close on their own as the heart grows during childhood. They usually allow only a small amount of blood to flow between the atria. \nModerate to large defects are much less likely to close on their own. They allow two or more times the normal amount of blood to flow through the right side of the heart. Large holes sometimes cause symptoms during infancy or childhood. \nLocation\nThree major types of ASD exist, based on the location of the defect on the septum:\n\nSecundum. This defect is in the middle of the septum. It is the most common form of ASD. About 7 out of every 10 babies born with ASD have this type. This type often closes on its own, unless it is large. \nPrimum.
1074878
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.
931657
Cardiac and skeletal muscles are both highly organized and contract in a single direction, uniformly. Smooth muscle, on the other hand is much more loosely organized. This probably leads to confusion about the order of contraction, etc.
878424
dear friend\n\nplease note that the heart is dual pump in other words there are right pump and left pump.\n\nthese right and left pump work together in a harmonious way\neach pump is made up of atrium and ventricle\n\nplease note that atria DO NOT pump blood to lungs instead they pump blood ONLY TO VENTRICLES. it is applicable for both the right and the left pump.\n\nthe ventricles on the other hand differ in their pumping destination\n\nright ventricle will pump blood only to LUNGS\n\nleft ventricle will pump blood only to THROUGHT OUT THE BODY\n\nwith regards \nkurian
608139
It's actually happened to a lot of women. I heard it was normal because it happened to me. My right is slightly bigger than my left, but you have to look for a long time to notice. I wouldn't worry about it.
219471
First i would like to know, what do you mean by "TRACING"? do you mean the measurement of blood flow?\n\nSecondly i really dont know how you can connect right atrium and aorta ?\n\nIf it is left ventricle and aorta you can measure by dopper the flow and cavity size of the chamber
443388
4 chambers ...\nWithin the adult heart are two parallel independent systems, each consisting of an auricle, or atrium, and a ventricle; from their anatomical positions these systems are often designated the right heart and the left heart.