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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 ...
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The heart is a muscular organ found in humans and other animals. This organ pumps blood through the blood vessels. [1] Heart and blood vessels together make the circulatory system. [2] The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs. [3]
Diplomatic recognition in international law is a unilateral declarative political act of a state that acknowledges an act or status of another state or government in control of a state (may be also a recognized state). Recognition can be accorded either on a de facto or de jure basis. Partial recognition can occur if many sovereign states ...
Coronary artery disease (CAD) or ischemic heart disease are the terms used to describe narrowing of the coronary arteries. [8] As the disease progresses, plaque buildup can partially block blood flow to the heart muscle. Without enough blood supply , the heart is unable to work properly, especially under increased stress.
De facto (/ d eɪ ˈ f æ k t oʊ, d i-, d ə-/, day FAK-toh, dee -, də -; [1] Latin: [deː ˈfaktoː] ⓘ; lit. ' in fact ') describes practices that exist in reality, regardless of whether they are officially recognized by laws or other formal norms. [2] [3] It is commonly used to refer to what happens in practice, in contrast with de ...
The separation of the executive and the legislature is the key difference between a presidential system and a parliamentary system. The presidential system elects a head of government independently of the legislature, while in contrast, the head of government in a parliamentary system answers directly to the legislature.