Question

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muscles that form rings around body openings are described by shape as being muscles.

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Explanation:

Identify the muscle shape category

Muscles are classified by fascicle arrangement and shape, such as fusiform, parallel, triangular, pennate, and circular.

Match the description to the shape

Muscles that form rings around body openings (sphincters) are circular muscles.

Answer:

Muscles that form rings around body openings are described by shape as being <blank>circular</blank> muscles.