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2. Economic model - Wikipedia

   en.wikipedia.org/wiki/Economic_model

   An economic model is a theoretical construct representing economic processes by a set of variables and a set of logical and/or quantitative relationships between them. The economic model is a simplified, often mathematical, framework designed to illustrate complex processes. Frequently, economic models posit structural parameters. [1]

3. File:Diagram of the human heart (cropped).svg - Wikipedia

   en.wikipedia.org/wiki/File:Diagram_of_the_human...

   Diagram of the human heart, created by Wapcaplet in Sodipodi. Cropped by ~~~ to remove white space (this cropping is not the same as Wapcaplet's original crop). == See also == * Image:Diagram of the human heart.svg - original

4. Anatomy of the human heart - Wikipedia

   en.wikipedia.org/wiki/Anatomy_of_the_human_heart

   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 ...

5. Circular flow of income - Wikipedia

   en.wikipedia.org/wiki/Circular_flow_of_income

   Basic diagram of the circular flow of income. The functioning of the free-market economic system is represented with firms and households and interaction back and forth. [2] The circular flow of income or circular flow is a model of the economy in which the major exchanges are represented as flows of money, goods and services, etc. between ...

6. Heart - Wikipedia

   en.wikipedia.org/wiki/Heart

   In the developed world, valvular heart disease is most commonly caused by degeneration secondary to old age, but may also be caused by infection of the heart valves (endocarditis). In some parts of the world rheumatic heart disease is a major cause of valvular heart disease, typically leading to mitral or aortic stenosis and caused by the body ...

7. Donald Trump once threatened to jail Mark Zuckerberg, but ...

   www.aol.com/finance/donald-trump-once-threatened...

   Donald Trump was threatening to send Meta CEO Mark Zuckerberg to prison “for life” if he interfered in the election just a few short months ago—but come Thanksgiving, the bad blood appears ...

8. Why Small Businesses Are Important to Our Economy and ... - AOL

   www.aol.com/why-small-businesses-important...

   At the heart of America's growth and prosperity are small businesses. Small and mighty, these businesses are vital not only to our communities, but at a broader economic level. See Our List: 100...

9. Circulatory system - Wikipedia

   en.wikipedia.org/wiki/Circulatory_system

   Diagram of the human heart showing blood oxygenation to the pulmonary and systemic circulation. The heart pumps blood to all parts of the body providing nutrients and oxygen to every cell, and removing waste products. The left heart pumps oxygenated blood returned from the lungs to the rest of the body in the systemic circulation.