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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
How does the congenital Heart disease disease progress over time?
The pathologic, physiologic, or biochemical mechanism results in the development of congenital heart disease. Congenital conditions exist at birth and may be hereditary or may occur during gestation up to the moment of birth.
How does the rhythm of the heart can be changed?
The rhythmic beating of the heart is maintained by the Sinoatrial node (80-100 beats/minute), the Atrioventricular node (40-60 beats/minute) or the Purkinje fibers (20-40 beats/minute). It involves the membrane potential of specialized myocardial cells in these parts. Once regions of the heart are fully depolarized (such as the ventricles), contraction follows. Immediately following depolarization comes repolarization, and thus the cycle can repeat itself.
Where does blood returning to the heart go?
When your blood comes back to your heart it goes into the right atrium.
What is circulation from the heart to all parts of the body back to the heart?
Systemic circulation.
Compared with pulmonary circulation which is from the heart through the lungs and back to the heart.
What side of the heart works harder and why?
The right side only pushes blood to the lungs and back. The left side has to push through the entire body.
Why does the difference between two side the heart exist?
because God created it like that !! how else do you want your heart to be !!
and Dolly is a nice name so is my name
i love you guys !
How does a heart attack affect the organ system?
At first, the cardiovascular system. Of course it can shut down all the other systems too....
Can your heart still beat when your dead?
yes of course,because the operationist have machines and also if a person is dead it only has 1 opportunityto breath.
Can vomiting be a sign of a heart attack?
Vomiting will not necessarily relieve the pain caused by a heart attack. The best thing to do if you suspect of having a heart attack is to take an aspirin and call emergency services (911 in USA, 999 in the UK).
What is the correct path of the blood in the heart?
As deoxygenated blood returns from the body, it flows from the vena cava into the right atrium. From the right atrium the blood flows into the right ventricle which pumps the blood through the pulmonary artery to the lungs. Oxygenated blood returns from the lungs via the pulmonary vein and enters the left atrium. The left atrium empties into the left ventricle which pumps the blood through the aorta and to the body.
What structure pumps oxygenated blood into the aorta?
what pumps oxygenated blood around the body are the arteries
Can breathing in dust particules cause an enlarged heart?
Dust mites, relatives of the spider, are too small to see without a microscope. Dust mites eat skin cells shed by people, and they thrive in warm, humid environments.
it can cause heart enlarged.
What are the causes of enlargement of the left atrium?
There is only one cause.
My penis.
It is WAY too big to fit,
so they had to enlarge the atrium.
How would you locate and label the parts of the heart on a diagram?
One of the easiest ways to draw the heart is to first look at a picture (like the image shown above). Notice how the heart is NOT "heart shaped" like a Valentine! Note how the heart is tilted, with the biggest bulk of it on the top and it tilts toward the left arm (right side in a picture, but left side of the body). Notice how the bottom looks smaller because it is tilted.
Next, make a fist with your right hand, tuck your thumb in, and look at your fist. Your fist is *almost* like a heart, but upside down. So--- take a piece of paper and lightly draw an X at the very top. Draw the X very faintly so you can erase it later. Now, turn the paper so the X you drew is at the bottom. Ask your mom, dad, or an older sibling to help you with the next step. With your right hand made into a fist, put your fist about in the center of the paper. Have the older person LIGHTLY draw around your fist. But instead of coming inward toward the spaces between your fingers, make the line curved as it goes down alongside your knuckles. Leave the "wrist" part un-drawn for now. Make sure the person draws very lightly so you can erase parts of it, if you need to edit it.
When the person finishes drawing around your fist lightly with a pencil, next turn your paper so the X is at the top again. You should have an image that is bigger on top, narrow at the bottom, and the image should tilt toward the right hand side of the paper (e.g. the left side of a person's body, or "in" your body).
You will need to EDIT the drawing so the line and curve looks smooth. Fill in a curved line along the blank area where your wrist could not be drawn. Keep looking at a textbook image of a heart while you keep editing the outside lines.
You know the heart has 2 sides, right and left. Tip your paper so the heart is sitting "straight". Now, freehand (without a ruler) very lightly draw a line from the midpoint on the bottom of the heart to the midpoint on the top line of the heart. Look at the picture I inserted above on this question. This center "line" is not really a line, but where the heart muscle divides. It isn't perfectly straight.
Turn your paper so the paper is straight again. Your "heart" should be taking shape now. Notice there are wide-thick arteries that come out the top of the heart and to the left (of the body, but toward the right side of your paper). They look like wide giant straws. You don't need to make these perfectly; just do your best. Compare your drawing to a textbook picture or to the image shown above.
When you are pleased with your shape of the heart, start labeling the structures. For example, Right Ventricle, Left Ventricle (both on the bottom); Right Atrium, Left Atrium (top). Remember to switch Right and Left---your picture should mimic your insides if you hold the picture up against your body with the picture facing outward. In fact, you can put your picture against your chest and very lightly put a R on the side of your right arm; an L for your left arm. Label the items per the R-L sides of your body. When you work on the picture, make sure you you label left and right in the perspective of the body--- so it is the reverse of looking at your paper.
The heart looks simple, but contains many structures in it. Ask your teacher how much detail to include. You can label the atria, the ventricles, the arteries. If you want to imagine inside the heart, you could draw valves - one on each side between each atrium and ventricle. A valve would look like a band of tissue, so a small curved line (like the line of a smile) could work to represent each valve. Don't connect the line for the valve to any other line.
Which part of the brain comtrols the heart beat?
Actually, the heart beats on its' own with the SA node in the heart wall. Impulses from nerves from the spinal cord can cause the heart to speed up or slow down almost instantaneously.
How are the lower and upper limits of your target heart ratye range defined?
Ranging from 50% to 90% of your maximum heart rate.
What you are looking for is "Stent". As per wikipedia definition:
In medicine, a stent is a man-made 'tube' inserted into a natural passage/conduit in the body to prevent, or counteract, a disease-induced, localized flow constriction.
For detailed info please see: http://en.wikipedia.org/wiki/Stent
