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The market value of the goods and services produced in an economy is the
Atrium
Chamber; particularly an upper chamber of the heart, lying above a ventricle.
Ventricle
Cavity in an organ, such as a lower chamber of the heart or the ventricles of the brain.
Capillaries
The smallest blood vessels in the body, responsible for the exchange of oxygen, carbon dioxide, and other nutrients and waste products between the blood and tissues.
Arteries
Blood vessels that carry oxygen-rich blood away from the heart to the body's tissues, characterized by their strong, elastic walls.
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