The outer layer of the pericardium surrounds the roots of the heartвЂ™s major blood vessels, and the inner layer is attached to the heart muscle. But in the real world, those characters can be hard to live up to (and just as hard to leave behind). In the ring, somebody must play the good guy and somebody must play their nemesis, the heel. A sac known as the pericardium surrounds the heart. If the name doesnвЂ™t sound familiar, have you heard about flesh-eating bacteria in the news recently Aimee, 24, has been fighting flesh-eating bacteria for several weeks. In a close-knit Georgia community, a family-owned wrestling promotion finds two brothers and rivals war over their late fatherвЂ™s legacy.

The coronary arteries run along the surface of the heart and provide oxygen-rich blood to the heart muscle.ДЄ web of nerve tissue also runs through the heart, conducting the complex signals that govern contraction and relaxation. The left ventricle pumps oxygen-rich blood through the aortic valve to the aorta and the rest of the body. The left atrium receives oxygenated blood from the lungs and pumps it through the mitral valve to the left ventricle. The right ventricle pumps the blood through the pulmonary valve to the lungs, where it becomes oxygenated. The right atrium receives non-oxygenated blood from the bodyвЂ™s largest veins - superior vena cava and inferior vena cava - and pumps it through the tricuspid valve to the right ventricle. It is also made up of four valves: the tricuspid, pulmonary, mitral and aortic valves. MORE FROM MICHIGAN: Sign up for our weekly newsletter The heart is made up of four chambers: two upper chambers known as the left atrium and right atrium and two lower chambers called the left and right ventricles. Blood is returned to the heart through venules and veins. It pushes bloodВ to the bodyвЂ™s organs, tissues and cells.Д«lood delivers oxygen and nutrients to every cell and removes the carbon dioxide and other waste products made by those cells.Д«lood is carried from the heart to the rest of the body through a complex network of arteries, arterioles and capillaries. These physio- anatomical differences have. Located between the lungs in the middle of the chest, the heart pumps blood through the network of arteries and veins known as the cardiovascular system. On the other hand, the dermis is a thick layer (2 mm on average) composed of more fibers compared to the epidermis. Call them what you like, just donвЂ™t call them late for dinner. In fact, the heart does more physical work than any other muscle over a lifetime. Zombie Flesh Eaters is know by many other titles, partially because RomeroвЂ™s Dawn of the Dead was released in Italy as Zombi, leading to the re-titling of ZFE as Zombie 2 to eliminate and expand confusion.

LISTEN UP: Add the new Michigan Medicine News Break to your Alexa-enabled device, or subscribe to our daily audio updates on iTunes, Google Play and Stitcher. ThatвЂ™s a lot of work for an organ no bigger than a large fist and weighing 8 to 12 ounces. This story was updated on January 31, 2020.Д®ach day, the average human heart beats about 100,000 times, pumping 2,000 gallons of blood through the body.

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