Where is the pleual membranes located? Are they simular in their function compared to the pericardial membrane
351534
If your talking about the pleural memebrane then it is situated between the lungs and ribs.....
882391
These are large, multicusped valves that prevent backflow from the ventricles into the atria during systole. They are anchored to the wall of the ventricle by chordae tendinae, that prevent the valve from inverting.\n\nThe chordae tendinae are attached to papillary muscles that cause tension to better hold the valve. Together, the papillary muscles and the chordae tendinae are known as the subvalvular apparatus. The function of the subvalvular apparatus is to keep the valves from prolapsing into the atria when they close. The subvalvular apparatus have no effect on the opening and closure of the valves, however. This is caused entirely by the pressure gradient across the valve.
583846
Blood goes from the superior/inferior vena cava into the right atrium, then to the right ventricle, through the pulmonary artery to the lungs, back through the pulmonary veins to the left atrium and then to the left ventricle, which pumps the blood out through the aorta into the rest of the body. The atria contract at the same time, and the ventricles contract immediately after. The "lub" of the "lub-dub" sound is made by the valves between the atria and the ventricles closing, and the "dub" of the "lub-dub" is made by the aortic and pulmonic valves closing.
815977
one is slippery-which is the cardiac muscle\n\nanoter one is rough- which is the skeleton muscle.
413091
Frogs have a THREE chambered heart, not two. Oxygen poor blood flows from right atrium to the ventricle where it is pumped to the lungs and skin to pick up oxygen. Next the blood flows back to the heart, collecting in the left atrium. It them flows to the ventricle and is pumped to the body, dropping off the oxygen. This oxugen poor blood flows back onto the right atrium and it begins again.\n\nThis process is simular in humans except we have two ventricles, and do not breath through or skin as much so the right ventricle pumps to lungs only.
422714
The arteriole side also has longitudinal intermitant striated muscle fibers. The veinuole side has multiple layers and thickens toward the vena cava.
764898
c) ventricular pressure falls below atrial pressure\n \nThe atrioventricular valves are the tricuspid and the mitral valves:\nThe tricuspid valve opens and the right ventricle fills with blood from the right atrium.\nThe mitral valve opens and the left ventricle fills with blood from the left atrium.\n\nSystole is when the heart muscle contracts diastole is when the heart muscle relaxes.
417595
from what i rememeber the heart makes two sounds, a heavy-thick (like bass) called 'dup' and a small thinner pitched one called 'lup'.\nthe 'dup' is due to the closure of the atrioventricular valces during systole (contraction - when the blood is pumped from the ventricles (which are the down compartment of the hearts) to the atriums (which are the upper ones). after this happens, the blood is passed through the aorta which has a valve to make the blood not go backwards (called semi-lunar valve) and when these valve close it makes the 'lup' sound !!! so it goes like this Lup-dup lup-dup lup-dup .............
387478
outer three coverings are renal fascia(outermost fibrous membrane), adipose capsule(middle fatty layer which absorbs shock), renal capsule(inner fibrous layer).\nlearn it as F.A.C and F is farthermost and C as closest(and pronunce as f**k)
686517
our lungs are covered by a double layerd sac..called the pleura. the two layers are called visecral and parietal.\nnormally there is very little fluid in the pleura...to overcome friction..etc..\nif there is accumulation of fluid, above normal...then it is called pleural effusion.\nit can be due to many causes...eg...inflammation, tuberculosis, malignancy...etc...
615588
I guess your're talking about the nephrons in the kidney. the filtration membrane or barrier is made up by the basement membrane or lamina and primary and secondary processes of the podocytes(that form filtration pore) However the visceral membrane (are you talking about the arteriole) does not act as a barrier as it is fenestrated.
1021658
no they dont ..  the septum devides the heart into two major parts
127328
It is controlled by the Knueter Valve which is located above the left ventricle. Also through expansion, and contraction of cappilaries and veins.
948867
The chordae tendineae run from the atrioventricular valve leaflets to the papillary muscle.  The papillary muscles contain heart conduction fibers and contract during systole (heart ventricular contraction).  As the papillary contract the attached chordae tendineae prevent the valve leaflets from flapping back into the atrium.   They are present in the right and left ventricles.
617014
i would say cardiac muscles.
409139
I think if it is fluid around the heart, he probably has what is called pericardial effusion. This is accumulation of fluid in between the 2 membranes that surround the heart.This can be caused by many things, which include:\n\n1. Viral Infections:  Coxsackie, influenza, Epstein-Barr, echoviruses, varicella, HIV, etc\n\n2. Bacterial: Usually from infections of the lung extending to the pericardial membranes.\n\n3. Tuberculosis\n\n4. Uremia: commonly seen in Renal Failure.\n\n5. Autoimmune causes: like SLE\n\n6. Neoplastic: Due to extension of a malignancy from the lung to the pericardial membranes. Also malignancies like  breast cancer, Renal cell cancer, hodgkin's disease and lymphomas may invade the pericardial membranes and produce pericardial effusion.\n \n7. Drugs/ Radiation\n\nSince the causes are too many, it would be difficult toguess what is causing it in your uncle. The difficulty that he has in breathing could be due to the increased pain during inspiration that is seen with the inflammation of these 2 membranes. It could also be due to a lung disease or accumulation of fluid around his lungs (pleural effusion) too (just like the fluid around his heart).
313456
the ventricles, right and left