What is heart?

  • (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
    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:

Digoxin - Pharmacokinetic Properties
... 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 ...
Digoxin - Mechanism of Action
... the extracellular aspect of the α-subunit of the Na+/K+ ATPase pump in the membranes of heart cells (myocytes) and decreases its function ... potential, which leads to a decrease in heart rate ... contractility (the force of contraction) of the heart without increasing heart energy expenditure ...
William Buckland - Megalosaurus and Marriage
... and contemporary, recalled, “Talk of strange relics led to mention of the heart of a French King preserved at Nuneham in a silver casket ... have 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 ...
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 ...
Echocardiography
... to cardiac echo or simply an echo is a sonogram of the heart ... three-dimensional, and Doppler 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 locus of feelings and intuitions.
    Example: "In your heart you know it is true"
    Synonyms: bosom
  • (noun): An inclination or tendency of a certain kind.
    Example: "He had a change of heart"
    Synonyms: spirit
  • (noun): The courage to carry on.
    Example: "You haven't got the heart for baseball"
    Synonyms: mettle, nerve, spunk
  • (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): A playing card in the major suit of hearts.
    Example: "He led the queen of hearts"
  • (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

Famous quotes containing the word heart:

    O tiger’s heart wrapped in a woman’s hide!
    How couldst thou drain the lifeblood of the child,
    To bid the father wipe his eyes withal,
    And yet be seen to bear a woman’s face?
    Women are soft, mild, pitiful, and flexible;
    Thou stern, obdurate, flinty, rough, remorseless.
    William Shakespeare (1564–1616)

    What of the heart without her? Nay, poor heart,
    Of thee what word remains ere speech be still?
    A wayfarer by barren ways and chill,
    Steep ways and weary, without her thou art,
    Where the long cloud, the long wood’s counterpart,
    Sheds doubled darkness up the labouring hill.
    Dante Gabriel Rossetti (1828–1882)

    Son, brother, father, lover, friend. There is room in the heart for all the affections, as there is room in heaven for all the stars.
    Victor Hugo (1802–1885)