A Muscular Ring That Prevents Backflow of Materials into the Previous

question 25

Short Answer

A muscular ring that prevents backflow of materials into the previous digestive compartment is called a _______________.

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Definitions:

Technological Advance

The development of new technologies or the improvement of existing technologies to enhance productivity, efficiency, or quality in goods and services.

Opportunity Cost

The economic impact of rejecting the following preferable option when deciding.

Positive Statements

Claims that attempt to describe the world as it is.

Normative Statements

Claims that attempt to prescribe how the world should be.