Heart

Blood receives oxygen and releases carbon dioxide as it passes through the lungs (within the blood vessels), therefore it would be oxygenated blood traveling from the lungs into the heart, and through the heart and going out to all major organs, the brain, and to the limbs.

Children. Just to emphasize what type of children; /YOUNG/ children or babies.

Frogs have three-chambered heart. In the heart, oxygenated blood from the lungs and deoxygenated blood from the respiring tissues enter by separate atria, and are directed via a spiral valve to the appropriate vessel-aorta for oxygenated blood and pulmonary vein for deoxygenated blood.

Because their circulatory system is very similar to ours. Also, the size of our hearts are very close.

Heart rate: is the number of times your heart beats in a minute. This depends on certain factors, for example: if you are a young and healthy adult, your heart rate should be normal (for example 72 beats per minute). However, if you are a person under high levels of stress (but are otherwise healthy), your heart rate may become higher (for example, 94 bpm or higher).

Your heart rate increases in response to the higher levels of adrenaline that are released when you see or think about someone you love.

The purpose of the PCV valve is to regulate the flow of crankcase fumes into the intake manifold where they can be burned. Prior to 1963, cars had no PCV and used road draft tubes that just left the hydrocarbon emissions from the crankcase out into the open air. The PCV valve also has a secondary role as a check valve, to prevent flow back into the crankcase. This prevents potential ignition of the crankcase fumes, should the engine backfire. The PCV system is also crucial for to proper engine sealing. The system alleviates crankcase pressure, which can push out on seals and gaskets, contributing to oil leaks.

It is can be called necrocardiomyopathy, cardiac myonecrosis , myocardial infarction, or simply a heart attack.

Think about it logically. The lungs are the organ designed to allow transfer of oxygen from the air into the blood and CO2 from the blood back into the air. Delivering blood that already contains oxygen to this organ would therefore be a complete waste of time as more oxygen will not be able to get into the system. So it must be oxygen poor blood that goes to the lungs, where is takes up oxygen ready to go around delivering it to the rest of the organs. And indeed oxygen poor blood is the answer to your question. However things are never as simple as that are they. Only the cells of the alveoli get enough oxygen from the air irectly to survive. The bronchi nad bronchioles are too many cells thick for simple diffusion of oxygen from the air to sustain them. This means that like the rest of the body the cells in these part must reciece and oxygenated blood supply, which comes from the systemic circulation (ie not the pulmonary circulation) from the left side of he heart. The arteries that carries the oxygenated blood to these parts of the lungs are called the bronchial arteries. Their are bronchial veins that help to drain this blood, once is has been deoxygenated, back into the systemic circulation but interestingly the majority is drained by the pulmonary veins (which carry the oxygenated blood back from the alveoli). This causes a slight impurity in the oxygenated blood that is taken back to the left ventricle of the heart to be pumped around the body.

The Perch, like all gilled fish, has a two-chambered heart consisting of a single Atrium and ventricle. De-oxygenated blood is pumped through the heart into the gills, where it becomes oxygenated and then flows to the perch's body tissue through arteries.

Atrium-->Ventricle-->gills-->arteries-->body tissue-->veins-->repeat

The fluid inside the pericardium is drained by inserting a needle through the chest and into the sac itself.

Ideally both! But depending on what you want to acheive in life it will be different. For example, if you have always dreamed of being a model and dating gorgeous footballers and love attention from men the answer to this question is LOOKS. But if you want to be a scientist and like guys based on personality and prefer the quiet, peaceful life then it would be BRAINS. Warning: Remember always that beauty is only skin deep, and even your looks will fade.

== == Brain is far more important that beauty. As we all know beauty fades with time compare to brain that will last for so long. Even if you have beauty and you don't have a brain you're still useless; but if you have a brain even without beauty you can still do whatever you want.

the blood cells help it from getting discinigrated.

Yes, Eddie Levert, front man of the classic rhythm and blues group, The O'Jays, has been married twice to , Martha , the mother of three of his children, who he married 1966, and to his long time girlfriend, Raquel Capelton, mother another daughter, who he married in 2005.

The average is about 60-80 BMP.

This is quite a complicated question to answer briefly.

A heart attack is most commonly due to a sudden blockage in one of the blood vessels supplying the heart muscle. When one becomes blocked the blood supply to a part of the heart is cut off and because the heart muscle is constantly active, this area can rapidly start to die, hence the name "myocardial infarction" myocardium = "heart muscle", infarction = "death due to lack of blood supply". The underlying cause of this sudden blockage is most commonly a fatty deposit in these blood vessels called an atheroma.

There are several things that a doctor will look at.

The first and most obvious is how unwell the patient is. How bad are the symptoms? Does the pain go away when you give them drugs such as nitrates (which dilate blood vessels and let more blood through) or morphine? Are they very short of breath or is the person's blood pressure dropping? (this suggests the heart is damaged too much to be able to pump blood to the lungs and around the body).

You also need to look at the patient as a whole. A fairly young patient with no previous cardiac history will make a better recovery than a diabetic 90 year old man who is a smoker, is obese, who has had 3 previous heart attacks, also has heart failure and has had a triple cardiac bypass (although an obese, diabetic smoker with this history wouldn't live to be 90, but it's just for illustration :) )

One of the most important tests is the electrocardiogram (ECG). This is difficult to explain without a knowledge of how the ECG works. Wikipedia does a fairly neat job of it here:

http://en.wikipedia.org/wiki/Electrocardiogram

The ECG looks at electrical signals given off by the heart from several different angles. One view of the heart is called a "lead", so if there is an abnormality in an area, it will show up most in the direction of the lead that is looking at that side of the heart. If several of the leads have an abnormality it shows the area affected is large, so from the ECG you can sometimes determine whether a small or large proportion of the heart muscle is damaged.

You can also tell whether there is an acute blockage in the heart that may benefit from giving drugs to break down the clot. This is called ST elevation (or an ST elevation MI, or STEMI).

There are also some blood tests you can do. Some enzymes are released from the heart muscle when it is damaged which can be measured in the blood. These include one called creatine kinase and another called troponin. These tend to be higher when more muscle is damaged. However, going back to the first paragraph where I mentioned an atheroma, it is possible for somebody to have a very small amount of heart muscle damage because of a minor blockage, but a very unstable fatty deposit in the wall of the blood vessel, that might burst at any time and cause a large catastrophic blockage.

So in summary, assessing severity of a heart attack can be difficult and you need to look at:

1) The Patient as a whole, taking into account age, past medical history, cardiac risk factors (mainly hypertension, diabetes, smoking, family history)

2) Severity of symptoms

3) ECG changes

4) Cardiac enzymes

I'm sure there are more things that a cardiology specialist would say but I'm just a junior doctor so please anyone amend this as you like!

Ants do not have a heart. They have a dorsal aorta that functions like a heart.

The risk of a heart attack during a skydiving is the same as it would be during any other high adrenaline experience. If considering skydiving with a heart condition that could lead to a heart attack, consult your doctor to make sure you are physically fit for skydiving and inform the instructors at the drop zone you are going to.

There are four electrolytes that are important to heart function, potassium, calcium, sodium and magnesium. Calcium is important in the actual contraction of the heart.

The left ventricle, being responsible for pumping the blood through the systemic circulation, generates the highest pressures. For this reason, the left ventricle has the thickest muscular walls.

It means one of two things: 1) You are very excited about something. 2) You are very scared or apprehensive about something. Either way, in such situations, your body releases extra amounts of adrenaline, which automatically gives you "butterflies" and a racing heart.

the 2 chambers of the heart are:

1. atrium

2. ventricle

around 100 to 160 beats per minute.
preferably around 120-140

From vena cava to Right atrium

to right ventricle

through pulmonary arteries (deoxygenated blood)

to lungs

back through pulmonary veins (oxygenated blood)

to left atrium

to left ventricle

to aorta (the body)

There are no medical studies that show that hypertension can cause heartburn. However, many high blood pressure medications can cause heartburn.