What is heart?

  • (noun): An inclination or tendency of a certain kind.
    Example: "He had a change of heart"
    Synonyms: spirit
    See also — Additional definitions below

Heart

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:

William Buckland - Megalosaurus and Marriage
... 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 ... looking at it, exclaimed, ‘I have eaten many strange things, but have never eaten the heart of a king before,’ and, before anyone could hinder him, he had ...
Heart Valve
... A heart valve normally allows blood flow in only one direction through the heart ... The four 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 ...
Digoxin - Mechanism of Action
... α-subunit of the Na+/K+ ATPase pump in the membranes of heart cells (myocytes) and decreases its function ... action potential, which leads to a decrease in heart rate ... contractility (the force of contraction) of the heart without increasing heart energy expenditure ...
Digoxin - Pharmacokinetic Properties
... (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 ...
Echocardiography
... Echocardiogram, often referred to cardiac echo or simply an echo is a sonogram of the heart ... ultrasound to create images of the heart ... management, and follow-up 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): 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 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 firm rather dry variety meat (usually beef or veal).
    Example: "A five-pound beef heart will serve six"
  • (noun): The locus of feelings and intuitions.
    Example: "In your heart you know it is true"
    Synonyms: bosom
  • (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

Famous quotes containing the word heart:

    Swift beating on his breast in sibylline frenzy blind
    Because the heart in his blood-sodden breast had dragged him down into mankind ...
    William Butler Yeats (1865–1939)

    Give sorrow words; the grief that does not speak
    Whispers the o’er-fraught heart and bids it break.
    William Shakespeare (1564–1616)

    As soon as you are in a social setting, you better take away the key to the lock of your heart and pocket it; those who leave the key in the lock are fools.
    Johann Wolfgang Von Goethe (1749–1832)