Heart

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.

Famous quotes containing the word heart:

    “Though I knit my brow,
    my gaze is fixed
    longingly
    anyway.
    Though I check my tongue,
    this tortured face of mine
    dissolves in a smile.
    Though I drive my heart to hardness,
    my body bears
    the gooseflesh
    of desire.
    When I see that man,
    how on earth
    can my anger
    survive?”
    —Amaru (c. seventh century A.D.)

    “The heart has its reasons which reason does not know.”
    —Blaise Pascal (1623–1662)

    “Curses, not loud but deep, mouth-honor, breath
    Which the poor heart would fain deny, and dare not.”
    —William Shakespeare (1564–1616)