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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 stethoscope measure heart rate?
The stethoscope itself does not measure the heart rate, it faciltates the user of the device to measure your heart rate through listening to the beating of your heart. The health care practioner places the stethoscope chest piece on your heart, typically at the apex or bottom of the heart beneath the left breast where your left ventricle is located and then counts the heartbeats, typically for a minute or so. As well, while listening to your heartbeat at the chest, the examiner will also count your peripheral pulsations at the wrist and/or carotid (neck) to assess your pulse rate to check for potential differences between the heart rate and pulse rate. Normally the heart rate at the chest and pulse rate at peripheral body locations are in sync in healthy people without cardiovascular disease.
The actual contraction of the ventricles of the heart is stimulated by?
Sinoatrial (SA) Node or "Pacemaker"
I believe that is called diastole, in contrast to systole, the contraction of the heart muscles.
Which chamber of the heart is considered the one working the hardest?
the ventricles because it pumps blood
Does age affect high cholesterol?
The chances of developing high cholesterol increase after the age of 45
As far as I am concerned, veins do not have valves..
The only part of the human anatomy which have valves are where the ear canal and nasal cavity connect, and in the entrances/exits of the heart where the arteries connect.
What does it mean if your heart only beats 45 times in a minute?
Arrhythmia means go see a doctor to check your irregular heartbeat
What is the major portion of the heart?
The heart is mostly made of muscles that are wrapped in arteries and veins. It is located on the left portion of the chest and at normal pace, pumps twice a second.
What substances affect the heart?
Here's a link to a website -- there are a lotof different drugs that can affect your heart!
When the heart pumps blood fasterwe also breath faster why?
This is a normal physiological state known as respiratory sinus arrhythmia.
The parasympathetic ("flight" component of fight or flight reaction) division produces a nerve that attaches to the heart, known as the vagus nerve.
During inspiration, the nucleus ambiguus in the medulla (lowest portion of the brainstem and controls our most basic instincts) sends off more action potentials to the vagus nerve, that depresses the heart's pacemaker, the sino atrial node, lowering the heart rate. During expiration, the nucleus ambiguus remains unstimulated and the heart rate appears to fall.
What is the lower part of the heart?
The heart is divided into four chambers. The two bottom heart chambers are called the ventricles. The upper chambers are the atrials.
When deoxygenated blood leaves the heart where does it go?
Freshly oxygenated blood from the lungs goes directly to the heart. From there, approximately 50% of the blood goes directly to the brain and head while the other half is distributed to the rest of the body.
What is the deepest layer in the wall of the heart?
The deepest part of the heart is the ventricle, and the deepest part of the ventricle is the apex.
What is the name of the structure that separates the lower chamber of the heart?
ANO NAME MO
MAGANDA KA BA
PANGIT KA BA
AKO PANGIT AKO :pp
DI KO ALAM SOWI
What is the sudden stop of heart function?
The sudden stop of heart function is called cardiac arrest.
What circulation does the left side of the heart perform?
The left side of the heart receives blood from the lungs before pumping it through the aorta and out to the rest of your body. This is referred to as the systemic circuit. After the body is nourished and oxygenated, the blood returns to the right side of the heart carrying waste and carbon dioxide to the lungs. This begins the pulmonary circuit that ends when the blood, once again, returns to the left side of the heart.
Is your heart the organ responsible for feelings and emotions?
In ancient Egypt it was believed that the heart was the organ responsible for feelings and emotion because it was the one organ that pumped blood throughout the body and that had any visible alterations in its beating when we changed our feeling: if we were happier, or angrier or sadder, or sleepier, our heart rate would be different.
Today we already know that it is not the heart that is responsible for feelings or emotion, but yes the brain. The heart does no longer have anything to do with this since it does not have a cerebral cortex. Neuroscientists have been studying the brain and have realized that it is the limbic system in our brains that govern our emotions. It consists of several parts of the brain working together; the amygdala, the hippocampus, the basal ganglion, and the thalamus, as well as other parts.
Another OpinionYour heart has nothing to do with your feelings and emotions; your brain does. An Expert's OpinionAccording to a leading authority on neurotransmitters, Candice Pert Ph.D., she believes that emotions are the subconscious mind and that emotions can be triggered throughout the body's tissues and that they are not restricted only to the conscious parts of the brain. Another opinionAll feelings are located in brain in temporal region. Another Expert OpinionThis website shows that in recent discoveries, they have realised that that the heart actually has its own mind or its own 'brain' as stated in the article. Now consider lying to yourself. You try convince yourself in your brain that the lie is the truth, but your still beats. Your heart continues to show feelings even when you have already convinced yourself the lie is the truth. It is for the other person to tell until the he/she checks the change of pace by hand or through 'lie detectors'. Lie detectors in reality are to check the the change of pace in your veins or your heart. Even the iPhones and iPod touches have then now, as they ask you to place your finger on it for a while. During that 'while', it in reality is checking your heartbeat through your veins in your fingertip. If it continues at a normal pace, it will guess you have told the truth. If it notices changes, it will point that you have lied.
Why is half of the heart blue and half red?
Because the right side of your heart pumps deoxygenated blood and the left side pumps oxygenated blood.
