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The heart is a muscular organ situated in the mediastinum.It consists of four chambers, four valves, two main arteries (the coronary arteries), and the conduction system. The left and right sides of the heart have different functions: the right side receives de-oxygenated blood through the superior and inferior venae cavae and pumps blood to the lungs through the pulmonary artery, and the left ...
SVG illustration of the human heart, created by Wapcaplet in Sodipodi. Slightly modified for correct rendering by Yaddah (no changes to content). Cropped version withour white space available at File:Diagram of the human heart (cropped).svg Uploaded on 24 Dec 2003. Diagram of the human heart: Source: Own work: Author: Wapcaplet, Yaddah: Other ...
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Human Physiology/Print Version; Wikibooks:Featured books/Templates; First Aid/C for Compressions; Wikijunior:Human Body/Heart; Template:Goodbook/Human Physiology; User:Darklama/Main Page; User:Reece/Main Page; User:Reece/Main Page/Bookshelves; First Aid/List of Images; A-level Biology/Transport/mammalian heart; General Anatomy/Cardiovascular System
In Egyptian religion, the heart was the key to the afterlife. It was conceived as surviving death in the nether world, where it gave evidence for, or against, its possessor. The heart was therefore not removed from the body during mummification, and was believed to be the center of intelligence and feeling, and needed in the afterlife. [110]
From January 2008 to December 2012, if you bought shares in companies when Daniel M. Dickinson joined the board, and sold them when he left, you would have a 23.5 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. [1] [2] It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia meaning heart, and Latin vascula meaning vessels).
Winter brings less daylight and colder temperatures, which can disrupt sleep. Seasonal Affective Disorder (SAD) is more common in winter due to the lack of sunlight, causing sleep disturbances.