An em dash is a punctuation symbol used to indicate an explanation or emphasis.

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Mendel's Explanation of Inheritance

A Heliocentric Explanation of Retrograde Motion

An Explanation of the Blindsight Phenomenon

Some drug labels show the USP symbol; others do not.

A Hypothetical Explanation of Conduction Aphasia

Unisex Washroom Symbol

Author Question: An em dash is a punctuation symbol used to indicate an explanation or emphasis. (Read 30 times)

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