Between steps 7 and 8 in the diagram of blood flow through the heart, blood moves through the ___ valve. 
Definitions:
Legislation
Laws and statutory requirements passed by a legislative body or the process involved in creating these laws.
Marginal Benefit
Marginal Benefit refers to the additional satisfaction or utility that a person receives from consuming an extra unit of a good or service.
Marginal Cost
Marginal cost describes the increase in total cost that arises from producing one more unit of a particular good or service.
Economic Perspective
A viewpoint that envisions individuals and institutions making rational decisions by comparing the marginal benefits and marginal costs associated with their actions.
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