Examlex
__________ is demonstrated when a test measures consistently what it is trying to measure;__________ is demonstrated when a test actually measures what it is supposed to measure.
Fluid
A substance that has no fixed shape and yields easily to external pressure; can be a gas or a liquid.
Gap Junctions
Specialized intercellular connections between a multitude of animal cell-types that permit the direct transfer of ions and small molecules.
Cardiac Muscle
A specialized form of muscle tissue found only in the heart, characterized by interconnected cells that contract rhythmically to pump blood throughout the body.
Heart Wall
The muscle and tissue structure that comprises the outer layer of the heart, including the myocardium, the epicardium, and the endocardium.
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