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How does the invisible hand direct economic activity?
Esophagus
A collapsible tube from the pharynx to the stomach, through which pass the food and water the body ingests.
Involuntary Muscles
Muscles that operate without conscious control, responsible for functions such as heartbeats and digestive movements.
Inner Layer
Describes the innermost part or section of something, often referring to materials, substances, or biological structures.
Outer Layer
The external surface or coating of an object or material.
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