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Articles  

What limousine could I hire for my sister's wedding?
Category: Wedding Venues  

Your Guide to the Best Portland Attractions
Category: Wedding Entertainment  

Affordable and Attractive Wedding Gifts
Category: Wedding Registry Offices  

Travel through swinger cruises and swing with your love
Category: Honeymoon Destinations  

Book Naturalist Resorts While Traveling To Your Ideal Destinatio...
Category: Wedding Entertainment  

Clothing optional cruises- The ultimate travel destination for c...
Category: Honeymoon Destinations  

Canada Top Travel Destination Cities
Category: Honeymoon Destinations  

Topping It Off Right - How to Coordinate your hairstyle with you...
Category: Wedding Attire  

Violin Music in Demand for Los Angeles Weddings - Population is ...
Category: Wedding Entertainment  

The Inside-Outside Dilemma
Category: Wedding Venues  

AN EVENTFUL CAREER
Category: Wedding Venues  

Creative wording for wedding invitations
Category: Wedding Venues  

Rajasthan Tours & Travel & Car Rentals
Category: Honeymoon Destinations  

Planning a Multi Cultural Wedding
Category: Wedding Attire  

Saving For The Long Term
Category: Magazines Webzines and Literature  

What event would I recommend the Porsche cayenne limo for
Category: Wedding Entertainment  

Wedding Italy - Take a chance to get married in Italy
Category: Magazines Webzines and Literature  

Simple Ways to Plan a Wedding with a Theme
Category: Wedding Entertainment  

Ideas for a Romantic Honeymoon Destination
Category: Wedding Entertainment  

Choosing the Best Caterer for your Dream Wedding
Category: Wedding Venues  

Tips for Including Children in a Wedding
Category: Wedding Attire  

Tips to Get Cheap Low Airfare to Europe
Category: Honeymoon Destinations  

Specialist catering for wedding, changes the whole momentum of o...
Category: Wedding Venues  

Hen's night gold coast- the way to join the Australia's best gol...
Category: Wedding Entertainment  

Halong Bay, Vietnam in my mind
Category: Honeymoon Destinations  

Want to Write A Book - Start Writing Today
Category: Magazines Webzines and Literature  

Roses to Show Your Love
Category: Wedding Venues  

Tips to know her choice of engagement rings
Category: Magazines Webzines and Literature  

Things you need to know about perfect food catering
Category: Wedding Venues  

Entertainment & its different faces.
Category: Wedding Entertainment  

Birthday Parties--- An Absolute Fun
Category: Magazines Webzines and Literature  

The Planning Process of Your Wedding without loosing your Mind!
Category: Wedding Attire  

Choosing Your Wedding Music
Category: Wedding Entertainment  

Interesting Venues for Maryland Wedding
Category: Magazines Webzines and Literature  

Baby Care: Get Your Link Here - Limited Time Bargain at only
Category: Wedding Attire

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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, mollusks, and arthropods. The term cardiac (as in cardiology) means "related to the heart" and comes from the Greek ?a?d??, kardia, for "heart."

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).

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.[1]

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.[2]

Heart Subcategories

Heart Articles

Home is Where the Heart is
by Wedding Star
Nov 07, 2008
Heralding the ultimate in charm and romance, as well as a practical money saving solution, the search for the perfect wedding venue can sometimes end outside your own front door.

Whether you choose the home you currently live in, your family ...

Tips for Selecting Wedding Musicians
by Gail Leino
Jan 31, 2006
Planning a wedding celebration can be crazy, fun, and overwhelming all at once! So many decisions, so little time. Menu? Decorations? Flowers? Wedding Invitations? Bridal Showers? Music? Lets focus on the music and share suggestions to ensure a succe...

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