Cardio For Indie Rockers
Cardio (from Greek καρδίᾱ ''kardia'', 'heart') may refer to: * Of the Heart * Cardiology ** Cardiovascular system * Cardiovascular fitness * Aerobic exercise, also known as cardio * Cardio (album), ''Cardio'' (album), a 2010 album by Miguel Bosé See also

* * * Physical exercise {{dab ...
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Heart
The heart is a muscular Organ (biology), organ found in humans and other animals. This organ pumps blood through the blood vessels. The heart and blood vessels together make the circulatory system. The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs. In humans, the heart is approximately the size of a closed fist and is located between the lungs, in the middle compartment of the thorax, chest, called the mediastinum. In humans, the heart is divided into four chambers: upper left and right Atrium (heart), atria and lower left and right Ventricle (heart), ventricles. Commonly, the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. In a healthy heart, blood flows one way through the heart due to heart valves, which prevent cardiac regurgitation, backflow. The heart is enclosed in a protective sac, the pericardium, which also contains a sma ...
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