Heart

The endothelium is the medical term meaning lining of the blood vessels, including those of the heart. It is continuous with the endocardium, the inner lining of the heart chambers and heart valves.

We need our heart because it pumps blood through our body. When it does, the blood goes to all the body so every part gets all the blood that is nesessary.

The bulk of the heart rests on the Left side of this heart.

In a healthy person, the left ventricle should be slightly larger than the right ventricle. The left ventricle has to pump with enough force to eject blood through the entire body (except the lungs). The right ventricle, on the other hand, only needs to pump with enough force to eject blood to the nearby lungs.

If you lift heavy weights with your left arm and light weights with your right arm, your left arm will become bigger than your right arm. In a similar manner, the left ventricle is larger than the right ventricle.

Extreme differences beyond what is normal could signify a pathological condition that is causing more resistance to the flow of blood out of the heart. For example, if the right ventricle becomes much larger than what is typical, it could mean that the pulmonary valve is stenotic (acting like a kink in a hose). This added resistance to flow makes the right ventricle work harder. When a muscle works harder, it grows (hypertrophies) to compensate.

If by "count your heartbeat," you mean the counting of how many beats occur within a specific amount of time, then that is called "Pulse Rate."

• Left Atria
• Left Ventricle
• Right Atria
• Right Ventricle

I'd get my butt to the nearest emergency ward and have it checked out. Go by yourself or call an ambulance. Could be serious. There can be a lot of things that it means, but the biggest concern I would have is an allergic reaction. A severe allergic reaction to something can cause your throat feel tighter, difficulty breathing, and it might feel like someone is sitting on you. The person might also feel itchy, see a rash, or swelling elsewhere. This would be a severe reaction, though, and need immediate remedy because the throat is actually swelling in that event.

It can also mean a heart attack, though usually the person wouldn't notice a tightening of the throat through the pain in their chest or jaw.

It might also be an anxiety attack. Like I said, a lot of possibilities, but my concern

A person with angina receives radiating pain in the chest, upper neck, left arm and shoulders, while the chest may feel very tight. There may be difficulty breathing alot of the time and person may break out in sweats. Overall it is a painful disease of the heart, where the coronary arteries are narrowed

Your heart size can be measured by looking at your very own fist. For most people it is about the size of your fist.

The heart is like a pump. It helps to pump blood one way through the circulatory system.

Your blood pressure can be low whilst having a heart attack if your heart is fairly old and fairly weak, but in most cases, no it cannot apart for the especially weak in the heart. But you have to take into consideration a mans heart can spurt water 13m high because of how hard the heart can squeeze, you have to remember a child's heart rate in the classroom whilst studying is about 60-75bpm and your heart has enough pressure to squeeze a tennis ball flat every Tim it beeps. The answer in probability for this question is 99.799 percent no.

The mitral valve is located between the left atrium (LA) and the left ventricle (LV). In normal circulation, oxygenated blood comes from the lungs into the LA, Whe the LA contracts, the blood goes into the LV. When the LV contracts, the blood is pumped into the aorta for circulation throughout the body. The mitral valve prevents blood from going back up to the LA from the LV during ventricular contraction. Mitral regurgitation is when the mitral valve does not close properly during ventricular contraction, and allows blood to go back up to the LA.

These are the atria - there are two in the heart.

The lungs and heart are found within the rib cage. The rib cage provides protection for these vital organs.

You can die of a heart attack later on if not treated.

A heart murmur that sounded lub-dub-slush indicates an unusual heartbeat. The valves may be benign or may indicate an underlying condition.

no your going to die. Absolutely not true , but many variables exist, such as age , health condition, etc.. My daughter's heart was enlarged due to a PDA and after repair of the problem she actually grew into the heart and has led a normal life.

Smooth Muscle - Muscularis Mucosa

Cardia myocytes. These special muscle cells can produce myoclonic movement (rythmic contractions initiated without input from the nervous system) when bathed in fluid containing oxygen and glucose.

tricuspid valve

the bottom chambers of the heart are the left and right ventricles and pump blood to the aorta and lungs respectively.

frog heart hass only one ventricle while the human heart has two ventricles

The tricuspid valve, also known as the atrioventricular valve (AV), is anchored by strong fibers that prevent it from turning inside out. Pressure generated by contractions of ventricles close the AV valves, keeping blood from flowing back into the atria.

Humans have a four chambered heart (two atria on top, one on the left and one on the right) and two ventricles below (one left ventricle and one right ventricle). The atria are connected to the ventricles and separated by the AV (atrioventricular valve). These valves can open and close. When the tricuspid valve opens in a normal person, blood flows from the right atrium to the right ventricle. Once this phase of the heartbeat is complete, the tricuspid valve is supposed to close completely so that blood in the right ventricle does not flow backward into the right atrium (we want blood to flow forward, not backward).

This component of tetralogy of fallot is known as right ventricular hypertrophy. It is caused by the fact that the right ventricle, which transports oxygenated blood to the atrium, is working harder to attempt to get more of that blood to the rest of the body. Since the heart is a muscle, it will get thicker as it works harder.