Heart

The right atrioventricular valve (or right AV valve), also called the tricuspid valve, (for its three leaflet lobes) controls the flow of blood between the right atrium and right ventricle. (The opening itself is the "right atrioventricular canal.") It prevents dexoygenated blood from regurgitating back into the right atrium. The vale is called "tricuspid" because of its three leaflets; it must be noted however, that the tricuspid valve can contain between two and four leaflets.

The heart is in the thoracic cavity in a part called the mediastinum. It is protected by the pericardium, a membranous sac that surround the heart. The mediastinum is that space in the thoracic cavity between the lungs that contains the heart. It also contains the aorta, esophagus, trachea and thymus. The pleural cavity is the space in the chest between the lungs.

Assuming that you're consuming a normal amount of protein and are otherwise healthy and normal, supplements will not have any unwanted side effects. Protein supplements are not a complete dietary replacement. Excessive consumption of protein (300+ grams a day) can have unwanted side effects in the kidney and liver. (see link below) Always remember that too much is always bad for our health.so in taking too much protein will harm you too. why don't you add organic food on your diet, it has natural substance that can make you healthy. Some may had side effects depending on the source of the protein First consideration is what kind of other stuff is in the protein supplement. Some are full of sugar, and strange artificial ingredients. Does it has artificial sweeteners, artificial flavorings, hidden MSG, etc... Generally the less ingredients the better, and unless you know it's a good product then go with something plain and made your own drink/smoothie out of it. Soy protein - heavily processed food, no long resembles true soy protein or anything natural. Unless you know it's a good company I'd just avoid the soy due to heavy processing, and allergenic potential. Whey protein - also heavily processed except from a few sources that process why from unheated milk. Dr. Mercola sells a truly high quality protein powder from whey on his site (some other professional companies such as Designs For Health also are high quality, but those are only available through health care professionals). Hemp protein: if you use it please leave in freezer after opening, the omega-3's quickly become rancid in heat. The powder won't freeze in the freezer, as it has not water in it. There are some plain rice proteins on the market.

Yes. Notably (and unfortunately), this happened in 2008, when a fleeing bank robber broke into a 79-year-old woman’s house to hide from police. The woman died of a heart attack, and the robber was given a life sentence for causing her death. While every cardiac event is different, here’s some information about what fear does to your heart: When you feel you’re in danger, your brain orders a surge of adrenaline to course through your body—this triggers your fight-or-flight response, which, among other things, raises your heart rate. The intent is to pump blood to your muscles and other vital organs, preparing you for battle or escape, but in extreme circumstances and risk-prone hearts, this can cause a heart attack. That’s horrifying, but death by fear is rare. Here’s Vincent Bufalino, MD, in his interview with the American Heart Association: “You can have a sudden cardiac-related event related to an adrenaline surge, but I think it would be a stretch to say you could get that from someone coming in a werewolf costume to your front door. [Something that will give you a heart attack] is the kind of thing that you can't prepare for. If it happens, it happens, and you hope your body doesn't overreact to that event.” So, yes, someone has been scared to death, but this isn’t something you need to worry about.

visceral pericardium

The heart is a muscle, if you are asking whether having a heart diagnosed as being "enlarged" (or cardiomegaly) is it bad for you, the answer is it could be. That can be a finding from radiology or other imaging that may indicate the heart is building up the size of the muscle by having to beat harder and/or faster to compensate for some other problem that is not allowing proper circulation of blood. You may need further testing to be sure if there is an underlying problem and if so it can be addressed so you can prevent further heart enlargement and the strain of its extra work. If you are asking if having extra weight and size from large muscles is hard on your heart, then again, it could be. Usually weight issues that cause problems with your heart are due to obesity (excess fat), rather than excess muscle. The excess fat does more to damage your circulatory system than just make your heart work harder and it leads to other associated diseases and disorders that are also bad for your heart (such as diabetes and hypertension). Muscle actually is a more dense tissue than fat and, therefore can weigh more. Carrying too much extra weight, regardless of the source of the weight, can make your heart work harder just to keep everything oxygenated. However, usually those who have extra skeletal muscle are also doing other good things to offset this minor effect of the weight of muscle (cardiovascular exercise, good nutrition, etc.). Their bodies do not have excess fat that causes many problems since they are working out. The end result is often that the exercise and proper foods that are good for your lungs and muscles will offset any issues from the extra weight of the muscle. But, too much of a good thing can also end up being bad. Extremely and abnormally large muscles can be hard on all your body systems.

Saulat fatimi

Tramadol is an opioid which belongs to the depressant class of psychoactive drugs. Tramadol causes a decreased heart rate, due to it's depressant properties. If your heart is beating extremely fast, you may be having an allergic reaction to the drug. Allergies can develop at any time, even with previous use of a drug, and if you experience difficulty breathing and swelling consult an emergency room.

The human heart is the pump in our circulatory system. We know blood needs to move around within our bodies to supply building materials to our cells while taking waste away. And we also know that the blood must be in constant circulation to do this. The muscles of the heart contract in rhythm to force blood through our circulatory system, which is made up of the arteries and veins. In this closed system, pressure developed at a point is felt throughout the whole system, and the heart develops that pressure. The heart's main function is to pump blood, making it the functional core of the circulatory system. Incoming, deoxygenated blood is pumped through the right side of the heart and to the lungs, where the carbon dioxide is replaced with fresh oxygen. This renewed, oxygen-rich blood the makes it way back to the left side of the heart, where it is then pumped back out to the rest of the body where it starts its journey around and back all over again.

Yes , the valves open to allow blood to pass into ventricles .

Heart is an organ. It's a pumping organ which pumps the blood to the whole body. Organ means a working part of an organism (system)\ Since heart is a working part of our body, therefore it's an organ

Heart muscle is constantly working. It can not take rest. Working needed energy. Energy is derived from biological oxidation process. This process needs oxygen. Without an oxygen the muscle will die promptly. That is why oxygen is so much critical for the heart muscle.

yes, heartbeat is automatic and involuntary.

no it is not

Your skull. :D

When blood cells have oxygen they are red, when they have no oxygen they are a darker shade of red. The more haemoglobin the blood contains the more oxygen is going to attach to the iron which is the most important element of the haemo-globin.

The deepest part of the heart is the ventricle, and the deepest part of the ventricle is the apex.

Yes you can

lots of money.

To prevent backflow of blood

According to the Library of Congress' "Everyday Mysteries" section (refer to the link, below), sneezing does not cause the heart to stop. NO. This is a myth. Your heart does not stop when you sneeze. Follow the related link with information from the American College of Cardiology for the truth behind this much believed myth.

At 18 days [when the mother is only four days late for her first menstrual period], and by 21 days it is pumping, through a closed circulatory system, blood whose type is different from that of the mother. J.M. Tanner, G. R. Taylor, and the Editors of Time-Life Books, Growth, New York: Life Science Library, 1965, p. With an ultrasound, at about 3 or 4 weeks. With the device the doctor uses in the room, at about 9 weeks. I don't know for the things you buy at the store. I am going to disagree with this last answer. With a vaginal ultra sound a heartbeat can be detected as early as 6 weeks gestation but more commonly by 7-8 weeks gestation. Of course she could be right and we are just counting the weeks differently. With my first child my Dr. could hear my son's heart beat at 7 weeks with out a ultra sound and now being pregnant with my second child and having the experience in a medical setting working in a OB practice I have heard my baby's heart beat at 5 weeks and 3 days. Mayo Clinic says the heart begins to beat at 5 weeks and may be seen with an ultrasound. But note that the Mayo Clinic, numbers the weeks according to the start of the last period, so that conception is regarded as happening in week 2; thus the heartbeat begins during the 4th week after conception.)

The heart does need a constant supply of oxygen to produce energy in the cardiac muscles to pump blood.

It's certainly something that's potentially concerning. Another term for heart flutter is PALPITATION. It is the subjective feeling and awareness of one's heart beat. It can be slow, regular or fast. It can be regular or irregular. And most important, it can be sustained or terminate on its own. In older adults, Atrial fibrillation is the most common condition diagnosed when palpitations are associated with general and cardiovascular symptoms such as chest pain, shortness of breath, palpitations and fatigue. In younger people, anxiety or panic attacks are more common, but arrhythmias (abnormal heart rhythms) are also common. Overactive thyroid is another common cause and easily uncovered by a blood test. It is true that certain drugs, legal and illegal cause heart fluttering. Cocaine and amphetamine ("speed") often cause the abuser palpitations. Cold remedies that contain decongestants (phenylephrine or pseudoephedrine) also lead to palpitations. Many prescription drugs are not tolerated well and cause palpitations. If you experience SUSTAINED (longer than a few minutes, not just a couple of seconds like when surprised) palpitations, see your doctor immediately. While a heart problem is suspected, often fixing the offending reason (drug or condition) will solve the problem. The most dangerous and serious outcomes of palpitations from a cardiac cause include stroke, heart attack and death, so getting diagnosed and treated quickly is paramount. Some heart "flutters" are far less serious than others. Your physician should be sure to differentiate a benign one from a potentially serious one by performing EKG's.

The left ventricle (being the largest and strongest muscular part of the heart) does the heavy job of pumping blood out to the body (through the aorta, the largest blood vessel).