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The heart of a vertebrate is composed of cardiac muscle, an involuntary muscle tissue which is found only within this organ. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during a lifetime (about 66 years). It weighs on average 250 g to 300 g in females and 300 g to 350 g in males.

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Blogs for Heart

We are the Hearts Blog - (Heart of Midlothian) part of the BlogsFC team

(Heart of Midlothian) ... alex: What happened to this blog, I was enjoying following things and then ... the Hearts Blog is proudly part of the Blogs FC ...hearts.blogsfc.com/

I Heart Blogs

... best blogs, and ... The Gazette is the official blog for the site, with news, articles and ... enough to include I Heart Blogs in their list of Wordpress ...iheartblogs.com/

Wind's Heart Blog

Wind's Heart Blog. Home. 2008 Tour. Heart Archives by Ms. Tralwind. Posts from Ann and Nancy ... many good blogs and websites dedicated to Heart, that I ...www.the-heart-blog.com/

Clear Heart Blog

Clear Heart Blog. The Heart of a Carpenter. About Me. Joe Cottonwood ... Previously in this blog I've attempted to draw a portrait of a man through his tools. ...clearheartblog.blogspot.com/

Heart Monger Blog

Ben Mink to Produce New Heart Album. Howard Leese Interview. Heart and Journey to Play Kentucky State Fair. Summer ... Photo from the The Dirty Disher Blog. ...heartmonger.blogspot.com/

Wikipedia About Heart

Human%20heart%20with%20coronary%20arteries%20new.png

The heart of a vertebrate is composed of cardiac muscle, an involuntary muscle tissue which is found only within this organ. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during a lifetime (about 66 years). It weighs on average 250 g to 300 g in females and 300 g to 350 g in males.

Early development

main: Heart development The mammalian heart is derived from embryonic mesoderm germ-layer cells that differentiate after gastrulation into mesothelium, endothelium, and myocardium. Mesothelial pericardium forms the inner lining of the heart. The outer lining of the heart, lymphatic and blood vessels develop from endothelium. Myocardium develops into heart muscle.

From splachnopleuric mesoderm tissue, the cardiogenic plate develops cranially and laterally to the neural plate. In the cardiogenic plate, two separate angiogenic cell clusters form on either side of the embryo. Each cell cluster coalesces to form an endocardial tube continuous with a dorsal aorta and a vitteloumbilical vein. As embryonic tissue continues to fold, the two endocardial tubes are pushed into the thoracic cavity and begin to fuse together and are completely fused at approximately 21 days.

EHR-BBII.jpg

The embryonic heart rate (EHR) then accelerates by 150 for the first month of beating, peaking at 265-285 BPM during the early 7th week, (early 9th week after the LMP). This acceleration is approximately 3.3 BPM per day, or about 10 BPM every three days, an increase of 100 BPM in the first month. At about 9.1 weeks after the LMP, it decelerates to about 152 BPM (+/-25 BPM) during the 15th week after the LMP. After the 15th week the deceleration slows reaching an average rate of about 145 (+/-25 BPM) BPM at term. The regression formula which describes this acceleration before the embryo reaches 25 mm in crown-rump length or 9.2 LMP weeks is Age in days = EHR(0.3)+6.

There is no difference in male and female heart rates before birth, as found by Dr. Dylan Angiolillo in 1995.

Structure

The structure of the heart varies among the different branches of the animal kingdom. (See Circulatory system.) Cephalopods have two "gill hearts" and one "systemic heart". Fish have a two-chambered heart that pumps the blood to the gills and from there it goes on to the rest of the body. In amphibians and most reptiles, a double circulatory system is used, but the heart is not always completely separated into two pumps. Amphibians have a three-chambered heart.

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Search results for Heart

HowStuffWorks "How Your Heart Works"

The heart is a vital organ that basically serves as a pump. ... We cannot live without our heart. ... This is why it is critical that we know how the heart works. ...www.howstuffworks.com/heart.htm

Heart and Education in Heart

Heart, a peer review journal for health professionals and researchers in all areas of cardiology ... BCS members access Heart Online here >> Online first ...heart.bmj.com/

Heart Disease and Other Cardiovascular Conditions on MedicineNet.com

Information on heart disease and related cardiovascular conditions includes medications, procedures and tests, symptoms, and treatment.www.medicinenet.com/heart/focus.htm

Your Heart & Circulatory System

Your heart is a hard-working muscle. Find out more in this article for kids. ... Heart Parts. It's Great to Circulate. Listen to the Lub-Dub. Pretty Cool ...kidshealth.org/kid/htbw/heart.html

American Heart Association

National health agency whose mission is to reduce disability and death from cardiovascular diseases and stroke.www.americanheart.org/

Images found for Heart

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News about Heart

Special Report: NEPA lifestyle increases risk for developing heart disease

The Scranton Times-TribuneA complete look at heart disease treatment and prevention and the impact it has on residents of Northeast Pennsylvania.http://www.thetimes-tribune.com/articles/2009/05/10/news/doc...

Briefs: Women's Wednesday for heart health

The Naperville SunHeart disease kills more women than all types of cancer combined. An Edward Heart Hospital cardiac nurse will offer a free heart risk appraisal and consultation from 6:30 to 8 p.m. Wednesday at the Edward Education Center, 801 S. Washington St. Participants may also participate in a respiratory screening and a variety of heart health lectures.http://www.suburbanchicagonews.com/napervillesun/lifestyles/...

Arrythmia Associated With Heart Attacks Linked To Higher Risk Of Death

Science DailyHeart attack patients who develop serious arrhythmia in connection with procedures to open blocked arteries face a significantly higher risk of death for several months after the procedure, when compared to similar patients who do not develop such complications.http://www.sciencedaily.com/releases/2009/05/090505162435.ht...

Suspected heart attack victim named

NZPA via Yahoo!Xtra NewsThe man who died after apparently having a heart attack behind the wheel of his bread delivery truck in Invercargill has been named.http://nz.news.yahoo.com/a/-/top-stories/5555934/suspected-h...

Suspected heart attack road fatality named

The New Zealand HeraldThe man who died after apparently having a heart attack behind the wheel of his bread delivery truck in Invercargill has been named. Maxwell James Ladbrook crashed his truck into a car yard in Dee St just after 4am on Friday.http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objecti...

News about Heart

Natasha Richardson: An appreciation for a true stage star

Chicago TribuneCo-starring with her future husband Liam Neeson in a 1993 Broadway revival of O'Neill's "Anna Christie," Richardson conquered a hugely difficult role, full of stereotyped Minnesota dialect and whore-with-gold-heart pitfalls. I still remember the big ... http://www.chicagotribune.com/features/lifestyle/chi-0320-ri...

FACTBOX-South Africa's new ministers

ReutersJOHANNESBURG, May 10 (Reuters) - Trevor Manuel was appointed to head a powerful new planning body on Sunday, keeping South Africa's former finance minister at the heart of policy-making. Manuel is a favourite among investors for his management of the ... http://www.reuters.com/article/bondsNews/idUSLA4367842009051...

Greek puppet master Evgenios Spatharis dies at 85

San Francisco GateAll of us who grew up watching the figures of these heroes bid farewell to someone very close to our heart." Spatharis was born Jan. 3, 1924, and followed his puppet master father, Sotirios Spatharis, into the craft. From his first performance in 1942 ... http://www.sfgate.com/cgi-bin/article.cgi?f=/n/a/2009/05/10/...

UPDATE 1-EU to find Intel anti-competitive - sources

ReutersThe sources said the Brussels-based Commission is expected to rule that Intel committed two violations in which the firm abused its dominance of the market for central processing units, the chips at the heart of the world's 1 billion personal ... http://www.reuters.com/articlePrint?articleId=USLA4875752009...

Queen's banker Coutts caught up in row over tax avoidance scheme

Guardian UnlimitedAt the heart of the tax avoidance scheme was a trust that made an allegedly deliberate loss, allowing clients to make deductions from their UK tax bills. Coutts earned a fee every time it put a customer into Castle Trust, though sources close to ... http://www.guardian.co.uk/business/2009/may/10/tax-avoidance...

Search results for Heart

heart: Definition, Synonyms from Answers.com

Click to enlarge) heart A. superior vena cava B. pulmonary artery C. left atrium D. left ventricle Ehttp://www.answers.com/topic/heart

American Heart Association

Learn more about the American Heart Association's efforts to reduce death caused by cardiovascular disease.http://www.heart.org/

HowStuffWorks "How Your Heart Works"

The heart is a vital organ that basically serves as a pump. Learn about heart chambers and valves, blood flow, heart's electrical system and blood supply.http://www.howstuffworks.com/heart.htm

Heart Disease Symptoms, Treatment, and Drug Information ...

Get detailed information on heart disease. Site offers latest news and expert advice on heart disease symptoms, treatment, and prevention  ... http://www.healthcentral.com/heart-disease/

Your Heart & Circulatory System

Your heart is a hard-working muscle. Find out more in this article for kids.http://www.kidshealth.org/kid/htbw/heart.html

Wikipedia results for Heart

Heart - Wikipedia, the free encyclopedia

The heart is a muscular organ in all vertebrates responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids ... http://en.wikipedia.org/wiki/Heart

Heart (band) - Wikipedia, the free encyclopedia

Heart is a rock band whose founding members came from Seattle, Washington, USA in the early 1970s. [1] [2] [3] [4] [5] [6] [7] [8] [9] Going through several lineup changes, the ... http://en.wikipedia.org/wiki/Heart_%28band%29

Heart disease - Wikipedia, the free encyclopedia

Heart disease is an umbrella term for a variety for different diseases affecting the heart. As of 2007, it is the leading cause of death in the United States, [1] [2] England ... http://en.wikipedia.org/wiki/Heart_disease

Heart failure - Wikipedia, the free encyclopedia

Heart failure (HF) is a condition in which a problem with the structure or function of the heart impairs its ability to supply sufficient blood flow to meet the body's needs. [1]http://en.wikipedia.org/wiki/Heart_failure,_congestive

Heart (symbol) - Wikipedia, the free encyclopedia

The heart has long been used as a symbol to refer to the spiritual, emotional, moral, and in the past also intellectual core of a human being. As the heart was once widely believed ... http://en.wikipedia.org/wiki/Heart_%28symbol%29
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Matters Of The Heart: Playing Hard ...

Matters Of The Heart: Playing Hard To GetIt's time for our "Matters Of The Heart" segment. Here with some answers is relationship expert and CBS 2 Blogger, Matt Titus.Windows Media - Video

Your Cheating Heart, Part 6

Your Cheating Heart, Part 6After all that science can teach us, what really fixes a broken marriage doesn't come from the lab... but from the heart. (Dateline NBC)Windows Media - Video

TITANIC My Heart Will Go On

TITANIC My Heart Will Go OnEvery night in my dreams I see you, I feel you, That is how I know you go on Far across the distance And spaces between us You have come to show you go on Near, far, wherever you...Flash - Video

Your Cheating Heart, Part 5

Your Cheating Heart, Part 5With his wife watching, a man who has cheated takes the ultimate lie detector test. (Dateline NBC)Windows Media - Video

OOpps !! My Heart Will Be Explode T...

OOpps !! My Heart Will Be Explode Too..Click here to watch the videoVideo - Video

Answers for Heart

♥randi♥heart!!!!!!!!?♥randi♥This site is in my faves...plus it gives you a lot of codes =] ♥ &hearts (plus a semi colone) ♥ and alt 3 works well too (make sure to use the number pad)theoneandonly321Can a lot of anxiety and stress cause a heart attack in a person with a healthy heart?theoneandonly321I am the same exact way. I have been experiencing panic/anxiety attacks for a little more than a year. It is one of the scariest feelings in the world when you think something is wrong with your heart...Question Queen ?What different types of heart diseases do they have?Question Queen ?I have angina and wear a nitro patch..Ask about daily aspirin.. A coated childrens asprin takes the chest pain away quickly. you dont need a prescription for spray nitro.The side efects not pleasant...not amusedHow does your resting heart rate translate into the amount of calories your body uses?not amusedNearly every time you pick up a magazine or newspaper these days, you see advertisements for products that supposedly raise your metabolism. Whether they're trying to sell you exercise equipment or fo...tooddHow does heart rate change with enlarged or smaller heart?tooddWhen systolic function (pumping) declines the heart tends to beat faster to try to compensate for the systolic function. This leads to hypertrophy of the heart muscle (the heart is putting in more eff...
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