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:
... given by IV injection in urgent situations (the IV injection should be slow, and heart rhythm should be monitored) ... For congestive heart failure, levels between 0.5 and 1.0 ng/ml are recommended ... For heart rate control (atrial fibrillation), plasma levels are less defined and are generally titrated to a goal heart rate ...
... 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 ... 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 ...
... often referred to cardiac echo or simply an echo is a sonogram of the heart ... and Doppler ultrasound to create images of the heart ... used in the diagnosis, management, and follow-up of patients with any suspected or known heart diseases ...
... Na+/K+ ATPase pump in the membranes of heart cells (myocytes) and decreases its function. 0 of the cardiac action potential, which leads to a decrease in heart rate ... This leads to increased 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 ...
More definitions 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 firm rather dry variety meat (usually beef or veal).
Example: "A five-pound beef heart will serve six"
- (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"
- (noun): A positive feeling of liking.
Example: "The child won everyone's heart"
Synonyms: affection, affectionateness, fondness, tenderness, warmheartedness
- (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): The courage to carry on.
Example: "You haven't got the heart for baseball"
Synonyms: mettle, nerve, spunk
- (noun): A playing card in the major suit of hearts.
Example: "He led the queen of hearts"
- (noun): The locus of feelings and intuitions.
Example: "In your heart you know it is true"
Famous quotes containing the word heart:
“Way down upon de Swanee ribber,
Far, far away,
Deres where my heart is turning ebber,
Deres where de old folks stay.”
—Stephen Collins Foster (18261884)
“Oh, I must keep my heart inviolate
Against the potent poison of your hate.”
—Claude McKay (18891948)
“I am black: I am the incarnation of a complete fusion with the world, an intuitive understanding of the earth, an abandonment of my ego in the heart of the cosmos, and no white man, no matter how intelligent he may be, can ever understand Louis Armstrong and the music of the Congo.”
—Frantz Fanon (19251961)