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Heart
The heart is a major organ of the body that is found in the circulatory system. It pumps blood throughout the blood vessels. Questions related to the heart should be put here.
8,781 Questions
What is the function of the atria ventricular node?
The atrioventricular node (abbreviated AV node) is a part of the electrical control system of the heart that coordinates the top of the heart. It electrically connects atrial and ventricular chambers.[1] The AV node is an area of specialized tissue between the atria and the ventricles of theheart, specifically in the posteroinferior region of the interatrial septum near the opening of the coronary sinus, which conducts the normal electrical impulse from the atria to the ventricles. The AV node is quite compact (~1 x 3 x 5 mm).[2] It is located at the center of Koch's Triangle-a triangle enclosed by the septal leaflet of the tricuspid valve, the coronary sinus, and the membraneous part of the interatrial septum.[3]
The AV node may also be (rarely) referred to as the Aschoff-Tawara node named so after Ludwig Aschoff and Sunao Tawara.[4]
How far is your heart from your chest?
its not constant it depends on your body size. some people have longer necks, some people have shorter......so......
sinoatrial (SA) node, atrioventricular (AV) node, atrioventricular (AV) bundle, right and left bundle branches, Perkinje fibers
Can anger cause heart attacks?
There are chances of getting heart attacks when you are angry. This is because when you are angry, your blood pressure increases.That is the flow of blood in bloodvessels and also in capillarieswill be very high. This may lead to haemorrage or heart attack. Therefore try to be cool always. If you angry wait for a moment think and you will definetly be controlled.
What you mean by autorhythmicity?
The pacemaker is known as the SA node (sinotrial) and it generates action potentials to the AV node and then to the bundle of his down to the purkinje fibers. The branching of cardiac muscle tissue and the intercalated discs allow action potentials to propagate to other cardiac mt cells. The autorhythmicity of the heart is attributed to the fact that it creates its own action potentials from the SA node and can be generated independently from the rest of the body. The heart's autorhythmicity also prevents it from reaching tetanus (like a skeletal muscle does), because myocardial tissue only allows a certain amount of action potentials through before it reaches its absolute refractory period when it comes to a plateau and after the wave drops again and gets hit with another action potential it has already rested.
What is the immediate destination of blood pumped from the right ventricle of the heart?
The immediate destination of blood pumped from the right ventricle of the heart is the pulmonary arteries. From there, the deoxygenated blood is transported to the lungs, where it undergoes gas exchange to become oxygenated. This process is essential for replenishing the blood with oxygen before it returns to the left side of the heart.
Is it normal for a child to have a heart beat they can feel?
This isn't a reasonably worded question.
What is the only tissue found in the heart?
the prosthetic tissue id persent inside of our heart and muscle tissue
Which structure of the heart acts like a automatic door?
I believe it is the ventricles. It collects and expels blood.
It is like an automatic door that closes and shuts itself.
Following volunteer whole blood donation, within hours your body recruits fluid from the tissue space to replace lost volume. Red blood cells are replaced by the bone marrow within 3-6 weeks. Current FDA guidelines allow whole blood donations every 56 days.
FDA.gov; AABB.org
What are disadvantages of the human heart?
Well.................................you have told the universe your heart is up for tradesies, and the universe will put you on their list, maybe something called, 'will trade for the good of man', say, or 'earn points for my brethren', and when your time comes , humans will determine if your heart is a candidate for removal, remove it, and someone will receive it.
I would also like to donate my heart immediately to a poor cop in our area who, I think, will appreciate a heart more than I currently am, but there's no getting around it. Start lining up your ducks now for the next time
How is the myocardium perfused?
A myocardial perfusion scan assesses the flow of blood to the heart when it's stressed by exercise or medicine. It's performed through injecting thallium into a vein in the arm or hand before the scan.
Can a child receive a heart transplant from an adult donor?
NO because the child below the age of pubierty under 13 year, hasn't fully developed the left and right ventrical and will not fit, a child's heart only weighs approximately 3 .25 lbs. but an adults weighs approximately 3.99 lbs, its just too large to fit between the lungs, gallbladder can be comprimized, and add additional pressure on the organ causing an arythmea, or emblisim.
What is the normal heart rate for fifty three year old woman?
for a 53 yr old woman heart beat 70--75
Where does blood flow to after it leaves the atrium and passes through the biscuspid valve?
Oxygenated blood from the lungs flow back into the heart via the left pulmonary veins into the left atrium, through the bicuspid (mitral) valve, into the left ventricle.
Is Human heart is myogenic or neurogenic?
In the human heart, contraction is initiated by a special modified heart muscle known as sinoatrial node. It is located in the right atrium. The SA node has the inherent power of generating a wave of contraction and controlling the heart beat. Hence, it is known as the pacemaker. Since the heart beat is initiated by the SA node and the impulse of contraction originates in the heart itself, the human heart is termed myogenic. The hearts of vertebrates and molluscs are also myogenic.
Trace a drop of blood from the heart to the right arm?
In tracing a drop of blood from the pulmonary to radial artery, there are 5 circulatory points. Pulmonary follows through to the subclavian artery, axillary artery, brachial artery, and then to the radial.
Oxygen-poor blood from the body returns to the hearts what?
Arteries always carry blood away from the heart. Veinsalways carry blood back to the heart.
Most arteries are high in oxygen except for the pulmonary arteries. Most veins are low in O2.
And then there are the pulmonary veins. The only veins that carry blood high in oxygen.
Why is a heart called a heart when it is not shaped like a heart?
If you look at a human heart at a certain angle you can see the general shape.
The actual heart came before the symbolic heart.
If the heart is diseased what will happen to the organism?
The organism will die. The heart pumps blood, which carries oxygen to all parts of the body- including the brain. If the brain is deprived of oxygen for more than 4 minutes, under most circumstances, the brain dies. When the brain dies, the organism dies.
