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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
Can cell phones cause heart attacks?
There is no evidence that cellphones can directly contribute to heart attacks, (unless there is extremely bad news on the other end of the line). To provoke a heart attack, the phone would need to exert enough energy to dislodge a coronary artery plaque, or create a clot to block an artery. The amount of radiant energy produced during a cell phone call is not enough to cross the chest wall, much less have an impact on the cardiac tissues. Persons with pacemakers however, are cautioned to avoid placing any electronic device that might produce a magnetic field, near their pacemaker. Magnets are used to program and control both pacemakers and Automatic Internal Cardiac Defibrillators (AICDs), and there have been reported interference in function of these devices from the magnets from ear-bud speakers and cell phones, when placed in direct proximity of the device.
Technically "shock" refers to the inadequate delivery of oxygen to the body tissues. With that in mind, congestive heart failure (CHF) can lead to shock because the heart is unable to adequately circulate blood through the body. It is still possible to be suffering from signs and symptoms of CHF but still have adequate delivery of oxygenated blood to you body tissues.
In the medical world many would describe CHF as the heart is drowning in fluid's.
Which human body system does the heart belongs to?
The circulatory system includes the heart, arteries, veins, capillaries, and blood. The heart functions as a muscular pump that helps force blood through the blood vessels. The blood serves as a fluid for transporting gases, nutrients, hormones, and wastes. It carries oxygen from the lungs and nutrients from the digestive organs to all body cells, where these substances are used in metabolic processes. The blood also transports hormones from various endocrine glands to their target tissues, and carries wastes from body cells to the excretory organs, where the wastes are removed from the blood and released to the outside. (information found in _human anatomy & physiology, sixth edition, pages 18-19, by john w. hole, jr.)
What is Another name of heart?
The word heart is a noun, a singular, common noun; a concrete noun as a word for an organ of the body; an abstract noun as a word for the central, most important part or the center of a person's thoughts and emotions.
Why do a human heart is called a heart but it's not shaped like a heart?
Our hearts look similar to a typically drawn heart. The main difference is the edges and more simplex and the veins and arteries are not included.
What valve does the blood pass when leaving the right atrium?
Blood passes the right atrioventricular valve, called the tricuspid valve, when it leave the right atrium. From there it flows into the right ventricle.
Which heart chamber pumps blood throughtout the body?
Though both ventricles of the heart pump blood out of the heart and into the body, I assume you're talking about the chamber that pumps blood to the capillaries of the head and arms or abdominal organs and legs. This would be the left ventricle, which receives oxygenated blood from the left atrium and sends it through the aorta to supply the body's systems with oxygen.
How many hearts does a turtle have?
Two atria and one ventricle make up the three-chambered heart of a snake. The right and left atria receive blood from the lungs and body, respectively, and pass it to the ventricle to be circulated again. Encased in a sac, called the "pericardium," the heart is located at the bifurcation of the bronchi. The heart is able to move around, however, due to the lack of a diaphragm. This adjustment protects the heart from potential damage when large ingested prey is passed through the esophagus. The spleen is attached to the gall bladder and pancreas and functions to filter the blood and recycle old red blood cells. The thymus gland is located in fatty tissue above the heart and is responsible for the maturation of special immune cells in the blood.
How many liters of blood is pumped through the heart per week?
it pumps for about 3333,4457 minters in 2 days
What act as doors between the chambers of your heart?
The heart does not have doors, but it does have valves that could be thought of as doors. They consist of the semilunar valves (the pulmonary semilunar valve and the aortic semilunar valve). The other two are the atrioventricularvalves (tricuspid and bicuspid valves).
How do the walls of the heart receive a blood supply in order to stay healthy?
the heart receives glucose and oxygen in the blood pumped through
How many heart chambers are in a lizard and which are the pumping chambers?
There are technically 3 chambers-- 2 atria and a ventricle-- but the ventricle is partially divided into 3 chambers the Cavum Arteriosum, Cavum Venosum, and Cavum Pulmonale. The ventricle is the pumping chamber.
When blood leaves the left side of the heart it is full of?
Blood entering the right atrium is full of carbon dioxide; that is, it is deoxygenated. From there it enters the right ventricle and is pumped to the lungs, where the carbon dioxide is exchanged for oxygen via the process known as respiration (simply put, breathing). The now-oxygenated blood returns to the left atrium of the heart, progresses to the left ventricle, and is pumped throughout the body before returning go the right atrium.
Why does the heart pump blood to the lungs before it pumps blood to the rest of the body?
The heart is really two pumps in one. It receives blood into its right side. This blood has been all around the body giving up its oxygen to all the various cells and collecting carbon dioxide. [This is the by-product of the cells using oxygen]. The heart then pumps this blood to the lungs where it exchanges the carbon dioxide that it has collected and takes on more oxygen. The blood is the returned to the heart but this time to the leftside. It is then pumped all around the body again. This freshly oxygenated blood contains 21% oxygen. When it returns to the right side of the heart having been all around the body, it still contains 17% of its oxygen which is why we are able to give mouth to mouth and successfully revive a person that has stopped breathing. Hope this helps.
What does soften your heart mean?
The heart is often thought of as the seat of emotion, so a hard heart means someone who has no feelings for whatever the person or situation is, and a softening of that heart means they are developing feelings.
What are the advantages and disadvantages of heart valve replacement over a heart transplant?
thankyou above man. the actual answer is this: A heart valve has saved my life. One disadvantage of a mechanical valve is that you have to take a coumadin/warfarin drug to prevent clots on the valve - however the mechanical valves tend to last longer than others (you may not need surgery as soon as if you had another one)
A full heart transplant will first require the availability of a heart - someone else might need it more. If you can get by with a valve, I recommend that route. thanyou for your time. :D
Are there valves in the pulmonary artery or the aorta.?
There are not valves in the pulmonary artery or the aorta. However there are valves between these and the heart. Between the right ventricle and the pulmonary artery there is a valve referred to as the pulmonary semilunar valve. Between the left ventricle and the aorta there is a valve called the aortic semilunar valve.
How much blood is forced out of your heart every hour?
Here you go.
http://www.biosbcc.net/doohan/sample/htm/COandMAPhtm.htm
Cardiac output is the volume of blood pumped by the heart per minute (mL blood/min). Cardiac output is a function of heart rate and stroke volume. The heart rate is simply the number of heart beats per minute. The stroke volume is the volume of blood, in milliliters (mL), pumped out of the heart with each beat. Increasing either heart rate or stroke volume increases cardiac output.
Cardiac Output in mL/min = heart rate (beats/min) X stroke volume (mL/beat)
An average person has a resting heart rate of 70 beats/minute and a resting stroke volume of 70 mL/beat. The cardiac output for this person at rest is:
Cardiac Output = 70 (beats/min) X 70 (mL/beat) = 4900 mL/minute.
What is the prognosis for aortic valve insufficiency?
The faulty working of the aortic valve can be caused by a birth defect; by abnormal widening of the aorta (which can be caused by very high blood pressure and a variety of other less common conditions).
What is the heart made out of?
There's a hierarchy to this; in the largest form, the heart is made from muscle tissue; muscle tissue is made from cells, and cells are composed of elements.
The heart is hollow and shaped like a cone. It is made of specialized muscle tissue which allows it to beat your entire lifetime. It is relatively small and is about the same size as your closed fist. Your teacher's heart weighs about 10 oz, and is about 5 inches long and 3 1/2 inches wide at its broadest point.
It pumps 30 times it's own weight each minute. Here's a good arithmetic question for you - how much does it actually pump in a minute? If you did your math right - you came up with an answer of 5.3 quarts.
How much would it pump in a day (24 hours)? (answer 1800 gal) and how much would it pump in a year? (answer 1.3 million gal) WOW! that sure is a lot of blood! Once that blood leaves the heart it travels about 60,000 miles of blood vessels before it returns back to the heart. If the average heart beats 60 times a minute how many miles does the blood travel in an entire 60 seconds?? Anything that can work that hard with with only a little rest between beats has to be something very strong. It's a muscle.
What guards the opening between the left atrium and left ventricle?
The interatrial septum separates the right and left atria. This wall prevents the mixing of oxygen-rich and oxygen-poor blood.
