WordGarden.iopylorus
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Meanings
Noun
the opening at the lower end of the stomach leading into the small intestine
Beyond the definition
Imagine your stomach as a holding tank for food. Once that food is mashed up and ready to move on, it needs a gatekeeper to let it into the small intestine. That is where the pylorus comes in. It is a muscular ring, or valve, at the lower end of the stomach that controls how quickly partly digested food, called chyme, leaves the stomach and moves into the next stage of digestion. Think of it like a slow-release tap, stopping the intestines from getting too much at once. Problems in this area can lead to slow stomach emptying or blockages. Doctors often talk about the "pyloric sphincter," the muscle that controls this opening.
The pylorus is a crucial part of your digestive system, specifically the lower section of the stomach that connects to the duodenum—the first part of the small intestine. It's not just one spot, but rather a region encompassing the pyloric canal (the narrow passage) and the pyloric sphincter (the muscular valve).
Historically, the word "pylorus" comes from the Greek word "pyloros," meaning "gatekeeper." This is a fitting description, as its primary function is to control the flow of chyme—the semi-liquid mass of partially digested food—from the stomach into the small intestine. The pyloric sphincter contracts and relaxes, releasing small amounts of chyme at a time to allow for efficient digestion and absorption in the intestines.
The pylorus can be involved in several medical conditions. Pyloric stenosis, often seen in infants, is a narrowing of the pyloric opening that prevents food from passing through properly and can cause vomiting. Ulcers can also develop in this area and may cause pain or bleeding. Doctors may use tests such as endoscopy to examine the pylorus and diagnose problems.
So, while you might not think about it daily, the pylorus is a vital gatekeeper in your digestive process, ensuring food moves smoothly from your stomach to your small intestine—a true guardian of gut health!
Examples
- 1
Anatomy
Food leaves the stomach through the pylorus and enters the small intestine.
- 2
Medical scan
The scan showed a blockage near the pylorus.
- 3
Infant condition
In some babies, the pylorus becomes too narrow, causing frequent vomiting.
See also
Forms and spellings
1 form open this card.
Main spelling
- pylorusnoun