sphincter function

Sphincters are circular muscles in the body that act like valves to control the passage of substances. They can open or close to regulate the flow of food, liquids, or waste. For example, the lower esophageal sphincter prevents stomach acid from flowing back into the esophagus, while the anal sphincter controls bowel movements. By contracting or relaxing, sphincters maintain proper bodily function and help prevent leaks or blockages, playing a crucial role in digestion and excretion. Their precise operation is essential for maintaining overall health and normal digestive processes.