Heart Definition and 156 Threads

Despite that emotions actually come from the brain, through language, we usually speak of them coming from the heart. Why is this? Why do we associate emotions with the heart? Is it because of how the heart reacts to emotions as to why primitive people began to associate them with the heart?

From the moment a persons heart stops beating, stop functioning, how long does it take until the brain starts to shut down and how long until it's completely non functional and you're dead beyond the point of revival? It's probably hard to conduct such an experiement but have there ever been...

I was going out with this awesome girl. After telling her how I liked hanging out with her, she was receptive and that day ended with good notes. A few days after while we were chatting, she told me she is still heart broken and is not ready for a relationship. She mentioned we should be...

Come to my attention vie the NYT article: Culprit in Heart Disease Goes Beyond Meat’s Fat ... The researchers had come to believe that what damaged hearts was not just the thick edge of fat on steaks, or the delectable marbling of their tender interiors. In fact, these scientists suspected...

why stress is "bad" for the heart Hi. I don't understand why stress is "bad" for the heart while exercising is "good". For example I'm having a final exam tomorrow worth 100% of my grade for a course and I'm having a huge stress (I feel adrenaline rushes almost permanently). I'm also used to...

Influenza vaccines can reduce risk of heart attack http://health.yahoo.net/experts/dayinhealth/shot-prevents-heart-attacks My sister, a doctor, has mentioned this before. She makes a habit of getting an annual flu shot.

Homework Statement When a human heart during a heartbeat pulls together the overpressure in the outwardgoing arteries is about 16 kPa. Every minute the heart drives 5 liters of blood around in the bloodstream. Calculate the average amount of power that the heart delivers Homework...

In an open heart surgery, blood is diverted to a heart-lung bypass machine by means of cannulae. A patient had previous CABG so the line was put into his leg, and the other in the right ventricle I think. Why would you put it in the leg? and would it be the right ventrical that the other cannula...

Hello! The other day, i was referring to some comic book and it said something about telepathy which made me wonder if the heart and brain really emit signals thaat are powerful enough to be able to be caught or processed? if yes, how... Elaborate help shall be acknowledged... Thanks

Homework Statement Why is human heart not a centrifuge pump but positive displacement pump ? Homework Equations The Attempt at a Solution Maybe bcoz there is no continuous flow of blood. blood goes thru body in packets hence we hear heart beats..

Is the Right Atrium and Left Atrium the same size?

This is a modern variation on the philosophy of Socrates I've been working on using a Functionalist approach. His famous dialogue method is the subject of future work, but this short chapter on agnosticism provides the core of the philosophy. Among other things Socrates believed moral...

if you have a severe hard cough for 30 Years can it make the Right Atrium of the Human Heart become enlarged?

Do you know if doctors can identify a heart from an EKG? I mean is the heart's electrical activity unique, like a finger print?

How long does the average medical team work to revive someone from a heart attack? A couple weeks ago a professional footballer suffered a heart attack on the field and they worked on him for 78 minutes! When does staff call it quits? Do average medical teams stop too early? Do most doctors...

ok, I have tried and failed. How does one graph the following on mathematica in 3D: \left( x^{2} + \frac{9}{4} x^{2} + z^{2} -1\right)^{3} - x^{2}z^{3} - \frac{9}{80}y^{2}z^{3} =0 with -3 \leq x,y,z\leq3 If someone could give me the command (what to enter), that would help. Heres what I...

There is a hugh amount of magnetic field during MRI scanning, I would like to know whether our heart beat rhythm will be affected by this magnetic field or not if the magnetic field is too strong. Does anyone have any suggestions? Thanks in advance for any suggestions

If you have ever shoveled snow you can imagine how someone with a bad heart might die from shoveling snow too fast. Suppose we have two identical twins, aged 54, with equally bad hearts. Suppose the first twin goes out to shovel his driveway which has a foot of heavy damp snow. Suppose he starts...

I used to know this, but then I forgot and I can't seem to Google it. What is the name of that condition, usually acute and brought about by extreme anxiety or fear, in which you feel your heart pounding so powerfully that it seems to pulsate your entire chest cavity, and you can even feel your...

Homework Statement Humans have about v = 60 cm3 of blood per kilogram of body mass and blood makes a complete circuit in t = 20 s seconds. For a human body of thickness 0.2 m and height 1.8 m, estimate the change in power output of the heart when the body is standing up on a horizontal...

Hello! I'm a biomedical engineer student and I'm working on a project about the fluid dynamics in artificial hearts. What I want is to compare the fluid dynamics in real hearts and artificial ones, have a general idea on what problems can arise when trying to produce an artificial heart...

In AP Bio we've been learning about blood pressure and pulse, and how to calculate pulse ranges of exercise. But, I was wondering, if we can calculate that, can we also calculate the maximum safe heart rate to within a reasonable range? Also, is it possible to calculate safe blood pressure...

What happens if the developing embyro and soon to be child is of a different blood type than the mother? At what point during development does the embryo start producing blood? The umbilical vein brings in oxygenated blood from the mother to the fetus' and also deoxygenated blood from the...

I had this first-aid lecture today, and something I heard got me confused. So the lecturer said that the "peeeeeeeep" and no electrical impulses being read by the electrocardiograph and the doctors continuing to defib the patient in the movies is basically wrong. That there ought to be some...

hey everyone well i just want to know how to solve this problem i asked a really cute girl but she is heart broken from her last x by the way her first love and i don't know how can i play the role of a savior ?? any advice thank you

I saw an example where the work of a heart was found to be 2 watts based on the height of a person and the liters of blood that it pumped throughout the day. Since we have closed circulation systems (unless we have a cut, annerism, etc. ) I thought height would not matter, and in order to...

Richard Feynman once remarked during a lecture that the invention of analytical methods such as calculus allowed people to "be more stupid", in reference to solving problems. I think he was on to something with that remark. Often when faced with a problem which requires me to set up some...

I'm going to college next year and I am having a really hard time choosing what to do. I really love physics. It is my passion and I am really good at it. I want to major in physics, but I know getting a lucrative job in that area is not going to be easy. I have been poor my whole life and I...

First point I can understand somewhat. Since many contractions, without much pause, would accumulate Calcium. Second point I'm assuming is saying the same thing, but I don't understand the terminology. Can anyone explain it clearly. Also hypoxia and hypercapnea directly stimulate vasomotor...

Ok I know that atria and ventricles contract independently and it makes sense heart would beat slower but what is the exact reason. The accesssory pacemaker that activates ventricles, is is lot slower than AV node is that the reason? Thanks :smile:

Hello everyone, Vasomotor centre for example, increases heart rate and increases blood vessel constriction and raises total peripheral resistance. The end result is increase in stroke volume. My question is if blood pressure is raised too much by constricting blood vessels, wouldn't that make...

Greetings. I've been looking for commercial products that are capable of actively sensing the user's heart pulse rate while attached to their wrist. No additional chest strap monitor, etc... included. Unlike all wrist-located heart monitors I've found online, I'm looking for one that can...

Homework Statement OMG, Embarrassing typo ^ *HEAT not HEART. :) Sorry! In any case, A construction worker uses a steel tape to measure the length of an aluminum support column. If the measured length is 18.6 m when the temperature is 21.2 C, what ist he length when the temperature rises to...

1 - a patient is undergoing open heart surgery . A sustained current as small as 25 muA passing through the heart can be fatal . Assme that the heart has a constant resistonce of 250 ; detrmine the mininum voltage that poses a danger to the parient . v= 25 X 250 = 6250

I was watching the Last episode of House for season 4 a few months back, where Amber receives damage to her kidneys making them unable to adequately filter out amantadine she took for a flu. They put her on dialysis and had her cryogenically frozen in an attempt to buy them more time for a...

Question Details Ok, so want to get a heart rate sensor, take it apart, and adapt it to make it bluetooth enabled so i can see the heart rate on a phone/computer. Where should I start? What hardware and software should I use? I'm really a beginner and have no idea where to start lol. Also, I...

https://www.youtube.com/watch?v=Zw9UUuUpmcQ Seems like it is faked, but I dunno. BTW, the uploader explained that the noise in the background is a howler monkey and you'll hear the guy making a howling sound back early in the video. Sounds strange, but anyway. That's the spider's exoskeleton...

Homework Statement The human heart is a powerful and extremely reliable pump. Each day, it takes in and discharges about 7,500 liters or blood. If the work done by the heart is that of an average American female, 1.63m; and if the density of blood is 1.03 x 103 kg/cubic meter, a) How much...

Just have a few questions about the cause of heart disease and oxidation of fats. I am looking for some studies that relate to the questions if possible. 1. Does saturated fat cause atherosclerosis or is it the oxidized cholesterol that usually accompanies it (as in most cooked animal...

I'm bit confused about this. This is my question This is the action potential duration of a normal cardiac myocyte [PLAIN]http://www.med.nus.edu.sg/paed/resources/cardiac_thumbnail/background/images/action_pot.gif Here are the potential pace makers. * SA node: 80 - 100 bpm * Atrial...

I'm looking for a info source containing systolic,diastolic/mean pressure in all four chambers of the heart. also, what does a mean pressure in a heart chamber even mean? Do the left and right atria not have systolic and diastolic pressure?

Hi there guys...this is for a project i am going to be doing for school tomorrow. The topic for my presentation is about the applications of different sciences (bio, chem, physics) and their roles in the causation of a heart attack. But I am having difficulties finding aspects that cause a...

Hello everyone, How do valves in the body basically work. I can understand how blood flowing on either direction can close or open valves depending on the type of valve. But someone told me it is the elastic recoil of the veins that closes the valve. I thought it would blood that was going...

Hello everyone, Can anyone explain simply why heart rate increases in inspiration. Also why does the aortic valve close before pulmonary valve in inspiration? In inspiration does superior vena cavae get more blood? From what I read there was something to do with blood pooling inside the lungs...

I'm here doing some god awful physiology lab report about to write a paragraph on mean arterial blood pressure and was thinking about the pumping mechanism and was tying to think if there was any such organism which has a continuous flow fluid transport system, and if so what's the biggest one...

Does heart muscle get "tired" like say leg muscle? I'm a 52 year old male and have been bicycling for pleasure and exercise for many years. I have noticed a pattern that would like some comment on. I have noticed that if on a hour to two hour ride that if I push too hard for too long that short...

When the heart pump and blood flow down the body , Does the body wieght increase,be the same or decrease? Why?

In another forum there was a discussion of the observable universe being heart shaped because of the expansion of space (unless I misinterpreted the drawing). Info that I have found says it to be spherical. Have you seen any drawings of anything heart shaped for anything cosmological?

this may not be the right forum, but I guessed so, reading the thread posted by Rex S titled as “Can there be Artificial Consciousness and Emotion? ” reminds me of an article I read last year, it was about heart transplant, I was thinking of it a couple of weeks ago, and thought I would’ve post...

I have been trying to solve this problem without any success. Not homework, just curious how to solve this, I'm trying to deduce physical models. Honestly I have no idea how to attack it, so I'd really appreciate if you could please provide some help. This is electrodynamics applied to...