Is there a valve seperating the right ventricle from the left ventricle?
400990
The two chambers of the heart are completely separate.  There are no valves between the two.
1034068
The wall of the left ventricle is thicker than that of the right ventricle because it has to pump the blood into the aorta and to the whole body. Thicker wall means more muscle and this means greater pumping power.
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.
67889
Yes, but how serious depends on how fast the leak is.  The heart sits in a tissue sac called the pericardium.  If the leak is slow, the pericardium will expand over time to adjust for the fluid.  This is usually referred to as a pericardial effusion. If the leak is fast the pericardium cannot strecth fast enough to account for the fluid and the heart is essentially sqeezed to death.  This is called Tamponade.  Tamponade usually requires immediate intervention either by surgically opening the pericardial sac, or more commonly, a pericardiocentesis where a needle is passed through the chest into the pericardial sac.  In both cases, the fluid is drained to relieve pressure on the heart.
1071228
smooth organs\nstriated muscles\ncardiac heart
587816
Look it up on wikipedia and associative references for good discriptions.  In short:\n\nMuscle fibres in left / right atrium ventricle (4 chambers) responsible for mechancial motion.\n\nStimulation of these muscle fibers is however required to instigate the 'cardiac cycle'  this is done by passing electrical signals throught the heart through special impulse nodes.  Look it up for more detail!
1097141
THe heart is made up of two pumps; one that contains oxygenated blood, and one that contains deoxygenated blood...they are divided by this thick wall called a septum...each half is made up of a ventricle and an atrium...that question was on my science quiz today!!!
138775
I found this great website http://www.yourpracticeonline.com.au/showcase.html\n\nIf you scroll right down to the bottom of the page there is a table in white, with a column labelled Heart, then under that click on the Heart Anatomy link. Sorry can't send you direct link - but this opens up a window with a superb anamation you can click around and even move around a 3d model of the heart. Then if you go through the presenation all the main items of the heart are shown.
1021658
no they dont ..  the septum devides the heart into two major parts
83107
Carotids supply the heart? I think the previous poster is confused.\n\nThe only main difference is that the left common carotid branches off directly from the aorta, whilst the right common carotid branches off the brachiocephalic artery. other than that, they both ascend and divide eventually into internal and external carotid arteries on each side.
814580
Evolution of the aortic arch system has been one of progressive deletion and substitution, accompanied by a reorientation or rerouting of the blood supply.\nThe greatest changes in the system occurred in the transition from the holoaquatic to the terrestrial habit, with deletion of the first, second, and finally the fifth pairs of arches. Associated with these deletions, and the development of the pulmonary circulation, was reduction and atrophy of the dorsal portion of the\nsixth arches. Subsequently, evolution of the system has resulted in atrophy of one of the radices aortae (left in birds and right in mammals), loss of the left systemic arch in birds, and loss or functional modification of the right systemic arch in mammals.\nStill further changes and deletions in this system are found to occur in the birds.\nOf very common occurrence is reduction or loss of the dorsal portion of either the left or right 3rd aortic arch, accompanied by fusion of the dorsal carotids, anterior to the carotid arch (unicarotid condition). In a few instances, however, both left and right dorsal carotids become reduced to ligamentous vestiges (ligamentiottleyi) and cephalic blood flow is carried by the vertebral and superficialcervical arteries. In such instances, the dorsal portions of both left and right carotid arches become obliterated.\nWith loss of the left systemic arch, the left ductus caroticus loses its posterior connection, and usually becomes functionally modified. In most instances this is followed by a similar disconnection of the right ductus caroticus. The latter, however, frequently retains its connection between the carotid and systemic arches and remains as a patent vessel.\nRecent studies on 810 species and subspecies of birds have revealed the following, rather interesting, fact. In a single specimen of Megapodius freycinet layardi,\nand over 30 specimens of the Trochilidae, both left and right systemic (4th aortic) arches were lacking. In each of these instances, it was apparent that the right ductus caroticus remained as the functional systemic arch which carried the blood\nsupply to the abdominal aorta. Such a condition is not to be regarded as totally unexpected in the course of evolution of the aortic arch system, although it has not, to the writer's knowledge, been reported previously.\nThe particular significance of the occurrence of this reduction in Megapodius and among the Trochilidae cannot be satisfactorily evaluated at this time. It seems to me to be significant that the Trochilidae appear to present a highly uniform occurrence\nin the deletion of the right systemic arch, particularly in view of their rather restricted distribution. Evolution of this family of birds probably centered in\nSouth America, after an earlier origin from the common Apode stock in Antarctica.\nInsular isolation of Megapodius layardi may have been a factor contributing to the evolution and deletion of the right systemic arch in this specimen. It has not, however, been ascertained to what extent this deletion may occur in this species, but\nfurther studies might reveal the expected frequency of occurrence.\nIn conclusion, it may be expected that, in the course of evolution of the aortic arch system of birds, only the proximal or ventral portions of the 3rd aortic (carotid) ancl 6th aortic (pulmonary) arches and the right ductus caroticus will remain as the\nfunctional portions of the embryonic aortic arch system. The major cephalic blood supply will then be carried by the vertebral and superficial cervical arteries, while the blood supply to the abdominal region will be carried by the ductus\ncaroticus and abdominal aorta.
339926
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
267182
The sinoatrial node (SA node) is embedded in the posterior wall of the right atrium, near the entrance of the superior vena cava.  This node contains a group of cells called pacemaker cells that establish heart rate.\n\nIt's not a valve, it's a group of cells.
276970
An abonormal dilatation of the artial septum with bulging of the septum at least half the distance to the left atrial wall. Congenital heart defect
976773
by   the "flaps" on the heart,    I think you  are  talking  about the "cusps" of  the  heart  valves.  There  are  four...   the  Tricuspid,  the Aortic,   the Mitral and the Pulmonary..    When   for    one of     a  number of different  reasons  the  "flaps"   or  cusps of   one  or more of these  valves   doesn't open    and shut  quite   right,   when the heart   as  finished  pushing  blood   with  each pump (systolic phase)    some of the blood    sucks back into   the chamber.       If   the condition is  very mild  the heart    can  usually  handle  it  and   get enough oxygenated blood    where it need  to be.         If  the situation gets   serious,   the  person will need   replacement of the  faulty valve...   usually  with a mechanical one..  sometimes pig  valves  are used.\n                         Used to be a  time    years  ago when doctors  didn't  realise  that   rheumatic   fever   in children  needed to be  treated with antibiotics  to  kill the bacteria  that would    migrate  to the heart  and  attack  the  valves.  The child usually  recovered  from the  rheumatic  fever,   but  the   attack on the valves   would   cause  scarring, which, over   the years, would   affect  the  proper  working of  the  valve cusps.(flaps)     Sometimes    you    can  get  a condition  where  the   cusp  opened and shut  with a  kind of  "floppy  action"...  usually  congenital  and  nothing to worry about.  Just  one of those things.\n                           Your best bet if you  want to learn a lot more would probably be to go to  Yahoo Search or some other   search  engine   and type in   "Heart Valves"          I'll bet  there will be  enough stuff there to keep you  reading  all day LOL>
206246
It is the false Aneurysm of the Right Ventricular Outflow Tract (RVOT), and is one of the complications that arise after surgery of congenital heart disease.
318170
The ventricles are fluid - filled cavities inside the bran, and continuous with the spinal column.The fluid is called "cerebro-spinal fluid" or "CSF".\n\nSee the pic that changes, in the section here called Brain Basics:\n\nhttp://staff.washington.edu/chudler/introb.html\n\nThe butterfly- shaped cavity shown is part of a ventricle, in cross - section.\n\nThat site has great info, presented in a readable fashion; have a look!