Q:Can someone please help me on this anatomy question:Describe the physical similarities and differences in the structure of the AV valves and the semilunar valves.Thanks

The two atrioventricular (AV) valves ensure blood flows from the atria to the ventricles, and not the other way. 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. The two semilunar (SL) valves are present in the arteries leaving the heart, and they prevent blood flowing back from the arteries into the ventricles. These are positioned on the pulmonary artery and the aorta. These valves do not have chordae tendinae, but are more similar to valves in veins.

Q:i have a '96 buick skylark and my check engine light is on...i got it checked and the test said it was my EGR valve. does anyone know how to explain in lamens terms how to replace my EGR valve??????

check your vacuum line first maybe replace it first and see if this takes care of the problem. then do what chromepla says

Q:is a 4 cylinder 16 valve.... 5 stars for the best answer....

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Q:What is a foot and check valve what's the difference between the two?

Check valves are designed to prevent back flow. A globe valve is used when the ability to throttle and control the flow is desired. The globe valve can be positioned at anywhere from 1% to 100% flow. This allows for very precise control over how much liquid will be allowed to flow through the valve. There is another type of valve called a gate valve. The gate valve can not be positioned with such precision as the globe valve and it is used when flow rate is not as important.

Q:So I was diagnosed with a bicuspid aortic valve a couple months ago, I am 20 now and I was told that the defect normal dosent cause problems untill late 30's-40's. I have been having chest pains and at times sever palpitations. Has anyone eles gone through this? Anyone older that has experience with this problem?

I have a bicuspid aortic valve, it was discovered when I was a few days old. I'm 22 now. If you are having chest pains and palpitations you really need to get in and see a cardiologist. They'll probably give you a heart monitor which is a 24 hour thing that you wear. If you don't catch anything try asking for an even monitor, one that you wear for a month. You really do need to go see someone though. If you want to talk further about it, because I know how scary something like that can be, we can chat further on yahoo or e-mail.

Q:1998 camaro3.8L v6sometimes when i start the car, it makes this loud ticking noise that goes with the RPMIm pretty sure its the valve, anyone know how to fix it, and how much it might cost?

This Site Might Help You. RE: How do fix a stuck valve? 1998 camaro 3.8L v6 sometimes when i start the car, it makes this loud ticking noise that goes with the RPM Im pretty sure its the valve, anyone know how to fix it, and how much it might cost?

Q:I bought a Bb trumpet from Ebay (I know, probably not the best idea) and when it arrived it was really good, except the valves. They wouldn't go down (or up) really well, so I oiled them, and it helped, but it still won't go up properly (it might go up halfway, then suddenly stop, then go up slowly). The valves sound like they're scraping the side a little, and valve oil doesn't do much good. I don't know what brand it is, so don't ask. Another thing, is there such a thing as over-oiling?

The trumpet has to have the valve holes lined up with the trumpet air passageways in order to have your air proceed by the trumpet and characteristic a sound produce. Your valve must have an computerized locking mechanism (the small piece of plastic close to the spring). now and again this receives worn down, and the valve gained't line up wisely. To treatment this, you should locate the starting up turning position of the valve and tighten the valve starting up there. i imagine that is ninety degrees to the left at the same time as the bigger plastic piece is dealing with the mouthpiece aspect of the trumpet.

Q:What exactly are valves and cylinders when talking about car engines? Say a car has 3 cylinders or 8 valves for example.

There are intake valves and exhaust valves. On the intake side, the intake valve opens which lets the fuel/air mixture into the combusion chamber. At some point (measured in degrees of crank rotation) the intake valve closes, the air/fuel mixture is compressed and ignited by the spark plug. Then the spent mixture exits the cylinder when the exhaust valve opens. Valve configuration varies somewhat, but regardless of how many valves there are there will always be at least one intake and one exhaust valve. Some cylinder heads have 2 intake and 2 exhaust valves which is what is described as the 4-valve per cylinder setup. Regarding Car Cylinders, the answerer says Cylinders in a car engine are pretty much like rowers in a boat. But they are not. Rowers always row in synch with each other. Cylinders are made to be out-of-sync for smoother operation. The more cylinders you have, the smoother the engine runs. Compare a 1-cylinder minibike with a 4-cylinder motorcycle (both air-cooled), or a 4-cylinder to an eight... big difference in smoothness.

Q:Im trying to replace the egr valve on a 97 lincoln continental. I need to find out what size wrench I need, to get the nut off. Do you know?

I am assuming you want to replace the EGR valve because you are getting an insufficient EGR flow trouble code. Before you replace a perfectly good valve with an inferior aftermarket part that will likely fix nothing, a little more diagnosis is in order. If you have access to a scan tool and a vacuum gauge, perform a KOER (key on engine running) test on the engine with the vacuum gauge connected to the hose to the EGR valve. When self-test reaches the EGR test, look for the vacuum guage to move during the self test. If it moves, the vacuum source and EGR solenoid are good. If not, trace the vacuum harness for leaks. Without the scanner and vacuum gauge, find a length of hose and suck on the hose, or connect to other vacuum source to test the valve. You are looking for an RPM drop at idle when you open the valve in this way. I suspect your problem is a passageway clogged with carbon. Remove the valve and throttle body to access the clogged areas and manually decarbonize. This is the most common reason for an insufficient EGR flow on a Lincoln, along with a faulty DPFE sensor or related hoses. My money is on the clogged passages or the bad DPFE sensor.

Q:ok...i want to find a valve that controls air pressure so i can let it out in 2 different ways for my pneumatic potato gunwhat websites or stores sell this (not home depot)

You might have to register on the site to order online. It is free. You can call them and order the catalog. It is free also. Hope this helps Email me if you want me to look it up in my catalog. Don't break any windows. Wingman