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:
... English raconteur and contemporary, recalled, “Talk of strange relics led to mention of the heart of a French King preserved at Nuneham in a silver casket ... it, exclaimed, ‘I have eaten many strange things, but have never eaten the heart of a king before,’ and, before anyone could hinder him, he had ...
... 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 ...
... of the Na+/K+ ATPase pump in the membranes of heart cells (myocytes) and decreases its function. 4 and phase 0 of the cardiac action potential, which leads to a decrease in heart rate ... This leads to increased contractility (the force of contraction) of the heart without increasing heart energy expenditure ...
... 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 ...
... to cardiac echo or simply an echo is a sonogram of the heart ... three-dimensional, and Doppler ultrasound to create images of the heart ... used in the diagnosis, management, and follow-up of patients with any suspected or known heart diseases ...
More definitions of "heart":
- (noun): A firm rather dry variety meat (usually beef or veal).
Example: "A five-pound beef heart will serve six"
- (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): An inclination or tendency of a certain kind.
Example: "He had a change of heart"
Synonyms: spirit
- (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
- (noun): A positive feeling of liking.
Example: "The child won everyone's heart"
Synonyms: affection, affectionateness, fondness, tenderness, warmheartedness
- (noun): The courage to carry on.
Example: "You haven't got the heart for baseball"
Synonyms: mettle, nerve, spunk
- (noun): The choicest or most essential or most vital part of some idea or experience.
Example: "The heart and soul of the Republican Party"
Synonyms: kernel, substance, core, center, essence, gist, heart and soul, inwardness, marrow, meat, nub, pith, sum, nitty-gritty
- (noun): A playing card in the major suit of hearts.
Example: "He led the queen of hearts"
Famous quotes containing the word heart:
“The classroom, with all its limitations, remains a location of possibility. In that field of possibility we have the opportunity to labor for freedom, to demand of ourselves and our comrades, an openness of mind and heart that allows us to face reality even as we collectively imagine ways to move beyond boundaries, to transgress. This is education as the practice of freedom.”
—bell hooks (b. c. 1955)
“Home—that blessed word, which opens to the human heart the most perfect glimpse of Heaven, and helps to carry it thither, as on an angel’s wings.”
—Lydia M. Child (1802–1880)
“Joy is prayer—Joy is strength—Joy is love—Joy is a net of love by which you can catch souls. God loves a cheerful giver. She gives most who gives with joy. The best way to show our gratitude to God and the people is to accept everything with joy. A joyful heart is the inevitable result of a heart burning with love. Never let anything so fill you with sorrow as to make you forget the joy of the Christ risen.”
—Mother Teresa (b. 1910)