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A strong ring of muscle typically refers to a sphincter, which is a circular band of muscle that can constrict or relax to control the passage of substances through various openings in the body. Examples include the anal sphincter, which regulates bowel movements, and the lower esophageal sphincter, which prevents stomach acid from flowing back into the esophagus. These muscles play crucial roles in maintaining bodily functions and ensuring proper digestion and waste elimination.

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1w ago

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