Heart

Pulmonary artery catheterization is a potentially complicated and invasive procedure. The doctor must decide if the value of the information obtained will outweigh the risk of catheterization.

The right ventricle.

The term for puncturing the heart is cardiocentesis.

A Heart Attack that is Silent ^__^ ;)

~Bexterr Was Heree

The heart rate will increase due to hypovolaemic shock!

Other than both having a spinal column, the vertebral structures of dolphins and humans are not very similar, one being adapted to swimming and the other to upright walking. The dolphin skeleton is more flexible and not as strong, and the hind limbs are represented only by small vestigial bones.

That's not such an easy question to answer, technically there is no "one thing" that controls the function alone. The heart is stimulated by electrical pulses which make it beat (which is part of the reason defibrillators work), these signals come from nerves connected to a certain part of the brain. I'm no medic but I do believe the "Hypothalamus" regulates a lot of your body's functions like body temperature. But then again, that is not a complete answer because there is another portion of the brain that controls fear specifically and commands the heart to beat faster in the "fight or flight" response. To put it into perspective there is an entire SYNAPSE of regulatory functions done by the brain and they overlap so much that learning how to be a brain surgeon is one of the most demanding jobs out there.

Many organs in the body have very few specific pain receptors (nociceptors). Because the heart has very few or no nociceptors, the brain has a difficult time interpreting irritation as pain. The nerves from your heart join with other organs from the general area and follows the same nerve pathways to your spinal cord then to your brain. En route, surrounding visceral (organ) neurons are stimulated. This creates a sensation of generalized discomfort commonly interpreted as pressure or a dull ache to the generalized area, typically the left arm and neck. Often, a myocardial infarction (heart attack) can occur with no pain symptoms at all, and patients only display weakness, shortness of breath, nausea, diaphresis (sweating), pallor, and heart palpitations. This is called a silent myocardial infarction. It occurs predominately in older people, diabetics, females, and people of African descent.

Brock, MICP.

6 years EMS experience

The brain doesn't control the heart. The heart controls itself. If you would take a single heart muscle cell, it will beat on its' own. Add another and they beat together. The heart has special muscle cells called pacemakers. The primary one is called the SA (sinoventricular) node. That sets that pace or rhythm. There is also a slower back up pacemaker called the AV (atrial ventricular) node.

Mitral valve lies between left atrium and left ventricle. It has got two cusps. So it is also called as bicuspid valve. It allows flow of blood from left atrium to left ventricle. The blood flow in reverse direction is prevented by the valve.

some benefits are NOT DIEING, and your heart working correctly.

Enlarged heart (cardiomegaly) isn't a disease, but rather a symptom of another condition. You may develop an enlarged heart temporarily because of a stress on your body, such as pregnancy, or because of a medical condition, such as the weakening of the heart muscle, coronary artery disease, heart valve problems or abnormal heart rhythms.

This will depend upon how good of physical condition the elderly woman is in. If she is a regular swimmer, runner, or otherwise is in excellent physical condition, 55 beats per minutes is probably fine. However, if she is not an active athlete, this may be a little low and could indicate an underlying problem that needs to be addressed by her doctor.

* Vena Cava * Right atrium * tricuspid valve * right ventricle * pulmonary valve * pulmonary artery * pulmonary circuit * pulmonary vein * left atrium * mitral (bicuspid) valve * left ventricle * aortic valve * aorta * systemic circuit

How often does this happen, once a night, once a minute, once every 5 beats? Is the pulse regular or irregular? Any feelings of pain or shortness of breath? A lot of people miss a few beats now and then. These are known as ventricular ectopics and are made worse by caffeine and stress. Maybe you are more aware of them when you are relaxed. They are not generally serious. However there are a whole host of other things it could be as well and it would probably be sensible to get a doctor to listen to your heart and do an ECG recording. I wouildn't lie awake at night worrying about it though.

Your heart is a cardiac muscle which means it never stops and works on its own.

Circulatory System parts and Functions

Heart- Pumps blood through the body

Arteries- Transports blood to the capillaries

Capillaries- distributes nutrients and oxygen

Veins- returns blood to the heart from the capillaries

Blood- is the liquid material that circulates throughout the body.It carries the nutrients to the cell.The blood delivers oxygen to the tissues.The blood also collects all waste products from all and brings them to the excretory system and other organs of excretion.

Oxygenated blood is pumped out of the heart by the left ventricle.

Cartilage can be found in a variety of places throughout the body including the articular surface of the bones, the rib cage, the ears, the nose, the bronchial tubes and the intervertebral discs.
Cartilage is located between bones to cushion and lubricate movement. It is also found at the ends of bones like the nose, and in other parts of the body where you need stiffening without bones, like in the ears. Many animals have an entire skeleton made of cartilage instead of bone, like sharks.

Your heart speeds up to pump extra food and oxygen to the muscles. Breathing speeds up to get more oxygen and to get rid of more carbon dioxide. When a fit person, such as an athlete, exercises the pulse rate, breathing rate and lactic acid levels rise much less than they do in an unfit person.

The heart takes in oxygen from the environment and delivers it to cells.

Blood enters the right side of the heart through the first part of the superior and ending part of the inferior vena cavae as well as the coronary sinus where it enters the right atrium. From the right atrium is flows through the tricuspid valve into the right ventricle. From the right ventricle it goes through the pulmonary valve into the pulmonary trunk and pulmonary .artery and into the lungs. blood returns to the heart via pulmonary veins. From the pulmonary veins the blood enters back into the left atrium then through the mitral (bicuspid valve) and into the left ventricle, then flows through the aortic valve into the aorta and systemic circulation takes place and de oxygenated blood comes back via veins and back into the heart for circulation again.

In the pulmonary circulation, deoxygenated blood leaves the right section of the heart through the pulmonary artery, enters the lungs and oxygenated blood comes through the pulmonary veins. The blood then moves to the left atrium of the heart.

The right ventricle pumps blood to the pulmonary trunk.