The heart is a hollow muscle that pumps blood throughout the blood vessels by repeated, rhythmic contractions. It is found in all animals with a circulatory system (including all vertebrates).
Read more about Heart.
Some articles on heart:
... English raconteur and contemporary, recalled, “Talk of strange relics led to mention of the heart of a French King preserved at Nuneham in a silver casket ... eaten many strange things, but have never eaten the heart of a king before,’ and, before anyone could hinder him, he had gobbled it up, and the precious relic was lost for ever.” The heart ...
... of the Na+/K+ ATPase pump in the membranes of heart cells (myocytes) and decreases its function ... lengthens phase 4 and phase 0 of the cardiac action potential, which leads to a decrease in heart rate ... contractility (the force of contraction) of the heart without increasing heart energy expenditure ...
... A heart valve normally allows blood flow in only one direction through the heart ... valves commonly represented in a mammalian heart determine the pathway of blood flow through the heart ... A heart valve opens or closes incumbent upon differential blood pressure on each side ...
... referred to cardiac echo or simply an echo is a sonogram of the heart ... three-dimensional, and Doppler ultrasound to create images of the heart ... of patients with any suspected or known heart diseases ...
More definitions of "heart":
- (noun): The courage to carry on.
Example: "You haven't got the heart for baseball"
Synonyms: mettle, nerve, spunk
- (noun): An area that is approximately central within some larger region.
Example: "They ran forward into the heart of the struggle"
Synonyms: center, centre, middle, eye
- (noun): The hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions pump blood through the body.
Example: "He stood still, his heart thumping wildly"
Synonyms: pump, ticker
- (noun): A playing card in the major suit of hearts.
Example: "He led the queen of hearts"
- (noun): A positive feeling of liking.
Example: "The child won everyone's heart"
Synonyms: affection, affectionateness, fondness, tenderness, warmheartedness
- (noun): The locus of feelings and intuitions.
Example: "In your heart you know it is true"
- (noun): An inclination or tendency of a certain kind.
Example: "He had a change of heart"
- (noun): The choicest or most essential or most vital part of some idea or experience.
Example: "The heart and soul of the Republican Party"
Synonyms: kernel, substance, core, center, essence, gist, heart and soul, inwardness, marrow, meat, nub, pith, sum, nitty-gritty
- (noun): A plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventionally used on playing cards and valentines.
Example: "He drew a heart and called it a valentine"
Famous quotes containing the word heart:
“From a great heart secret magnetisms flow incessantly to draw great events.”
—Ralph Waldo Emerson (18031882)
“The Sound of battle fell upon my ear & heart all day yesterdayeven after dark the cannons insatiate roar continued ...”
—Elizabeth Blair Lee (1818?)
“Foolishness is bound in the heart of a child; but the rod of correction shall drive it far from him.”
—Bible: Hebrew Proverbs 22:15.