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

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

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

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

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.

See also

• Anal canal
• Anal columns
• Anal sinuses
• Anal glands

References

Anal valves Resources
Latest articles Most recent articles Ongoing trials	Wikipedia