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:

    “What generous beliefs console
    The brave whom Fate denies the goal!
    If others reach it, is content:
    To Heaven’s high will his will is bent.
    Firm on his heart relied,
    What lot soe’er betide,
    Work of his hand
    He nor repents nor grieves,
    Pleads for itself the fact,
    As unrepenting Nature leaves
    Her every act.”
    —Ralph Waldo Emerson (1803–1882)

    “The heart beats thick,
    Big trout muscle out of the dead cold;”
    —Ted Hughes (b. 1930)