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heart wallpapers

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Red Roses & Love Heart
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Harmony
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✿⊱•╮ ✿ ╭•⊰✿
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Starcraft 2 Heart of the Swarm
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total downloads:1594
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Will you marry me?
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total downloads:1481
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I Love You Carved in a Tree
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total downloads:1469
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total downloads:1422
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Sacred hearts of Jesus and Mary
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total downloads:1414
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Sacred Heart of JESUS
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total downloads:1401
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HAPPY VALENTINE'S DAY
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total downloads:1319
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BETWEEN LOVE AND HATE
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total downloads:1304
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Sacred Heart of Jesus
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total downloads:1202
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Autumn Decoration
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total downloads:1169
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Coffee Heart
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total downloads:1145
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golden heart
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total downloads:1055
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total downloads:1006
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Just M
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total downloads:1005
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Love Heart with Flowers
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total downloads:990
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total downloads:986
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Chocolate love heart
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total downloads:949
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Heart Full Of Love
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total downloads:942
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The heart is a muscular organ in both humans and other animals, which pumps blood through the blood vessels of the circulatory system. Blood provides the body with oxygen and nutrients, and also assists in the removal of metabolic wastes. The heart is located in the middle compartment of the mediastinum in the chest. In humans, other mammals and birds the heart is divided into four chambers: upper left and right atria; and lower left and right ventricles. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. Fish in contrast have two chambers, an atrium and a ventricle, while reptiles have three chambers. In a healthy heart blood flows one way through the heart due to heart valves, which prevent backflow. The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid. The wall of the heart is made up of three layers: epicardium; myocardium; and endocardium. The h...

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