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).

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Famous quotes containing the word heart:

    “If with love thy heart has burned;
    If thy love is unreturned;
    Hide thy grief within thy breast,
    Though it tear thee unexpressed.”
    —Ralph Waldo Emerson (1803–1882)

    “Every man takes care that his neighbor shall not cheat him. But a day comes when he begins to care that he does not cheat his neighbor. Then all goes well. He has changed his marketcare into a chariot of the sun. What a day dawns, when we have taken to heart the doctrine of faith!”
    —Ralph Waldo Emerson (1803–1882)

    “Long, long, afterward, in an oak
    I found the arrow, still unbroke;
    And the song, from beginning to end,
    I found again in the heart of a friend.”
    —Henry Wadsworth Longfellow (1809–1882)