Anal valves

Anal valves are small folds of the mucous membrane in the anal canal that connect the anal columns. They are also known as Houston's valves, named after the British surgeon John Houston who first described them in 1830.

Etymology[edit | edit source]

The term "anal" is derived from the Latin word "anus" which means "ring" or "circle", while "valve" comes from the Latin "valva" which means "a part of a door". The term "Houston's valves" is named after John Houston, a British surgeon who first described these structures in 1830.

Structure[edit | edit source]

Anal valves are small, semilunar folds of mucous membrane found in the anal canal. They are located at the lower end of the anal columns and are responsible for connecting these columns. Each valve has a small opening on its inner surface, known as the anal sinus, which allows for the passage of mucus from the anal glands.

Function[edit | edit source]

The primary function of the anal valves is to assist in the regulation of fecal passage through the anal canal. They help to maintain continence by creating a seal when at rest, and allow for the passage of feces when relaxed during defecation.

Clinical significance[edit | edit source]

Abnormalities or damage to the anal valves can lead to various medical conditions. For instance, an infection in the anal sinuses can lead to the formation of an anal abscess or anal fistula. Additionally, conditions such as hemorrhoids and anal fissures can also be associated with the anal valves.

References[edit | edit source]

Anal valves Resources
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