pylorus etymology

Etymology

The word "pylorus" originates from the Greek words:

• pylōros (πυλωρός) = "gatekeeper"
• pylē (πυλή) = "gate"
• -ōros (-ωρός) = suffix for "keeper"

Meaning and Origin

The pylorus is the muscular sphincter (valve) located at the junction between the stomach and the small intestine (duodenum). It acts as a "gatekeeper" by regulating the flow of partially digested food (chyme) from the stomach into the duodenum.

The term "pylorus" was first used by the Greek physician Galen (c. 129-216 AD) to describe this structure. It has been retained in anatomical and medical terminology ever since, reflecting its gatekeeper function.

Additional Information

• The pylorus is innervated by both the sympathetic and parasympathetic nervous systems, which control its contraction and relaxation.
• Abnormalities in the function of the pylorus can lead to conditions such as pyloric stenosis (narrowing of the pylorus) and gastroparesis (delayed emptying of the stomach).

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