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| Sphincter (SFEENK-tur) | |
What is it? |
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| A ring-like band of muscle that opens and closes an opening in the body. An example is the muscle between the esophagus and the stomach known as the lower esophageal sphincter. | |
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|
Close Window |
| Sphincter (SFEENK-tur) | |
What is it? |
|
| A ring-like band of muscle that opens and closes an opening in the body. An example is the muscle between the esophagus and the stomach known as the lower esophageal sphincter. | |
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