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:
“A celibate, like the fly in the heart of an apple, dwells in a perpetual sweetness, but sits alone, and is confined and dies in singularity.”
—Jeremy Taylor (1613–1667)
“Poor shad! where is thy redress? When Nature gave thee instinct, gave she thee the heart to bear thy fate? Still wandering the sea in thy scaly armor to inquire humbly at the mouths of rivers if man has perchance left them free for thee to enter.”
—Henry David Thoreau (1817–1862)
“It is unconscionable that we ration health care by the ability to pay.... your heart breaks. Health care should be a given.”
—Kathryn Anastos (b. 1950)