What is the function of pyloric sphincter?

The pyloric sphincter is a circular band of muscle located at the junction between the stomach and the duodenum (the first part of the small intestine). Its primary function is to regulate the flow of partially digested food (chyme) from the stomach into the small intestine.

Here are the main functions of the pyloric sphincter:

Regulation of Gastric Emptying: The pyloric sphincter controls the rate at which chyme leaves the stomach and enters the small intestine. It ensures that the small intestine receives digestible food in small, controlled amounts, optimizing digestion and nutrient absorption.

Protection of the Small Intestine: By regulating the flow of chyme, the pyloric sphincter helps protect the delicate lining of the small intestine from the acidic and enzymatic contents of the stomach. This prevents potential damage and allows for efficient absorption of nutrients.

Maintenance of pH and Digestive Enzymes: The sphincter helps maintain the proper pH environment needed for the digestive enzymes in the small intestine to function optimally. It prevents large amounts of acidic stomach contents from entering the small intestine at once, which could disrupt digestion.

In summary, the pyloric sphincter plays a crucial role in the digestive process by controlling the passage of partially digested food from the stomach into the small intestine, ensuring efficient digestion and absorption of nutrients while protecting the small intestine from potential damage.