The Presence of ________ in the Veins and the Action

question 23

Short Answer

The presence of ________ in the veins and the action of skeletal muscle pressing on the walls ensure that blood return to the heart is in one direction.

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Definitions:

Single Status

The condition of being unmarried or not involved in a romantic relationship.

Psychology Class

An educational course focused on the study of the mind, brain, and behavior.

Working Couples

Partners who both engage in paid employment outside the home.

Family

A fundamental social group typically consisting of one or more parents and their children, often considered a unit of community and societal structure.