Inferior rectal veins

Inferior rectal veins (also known as anal veins) are a group of blood vessels located in the lower part of the rectum, which is the final section of the large intestine. They are responsible for draining blood from the lower part of the rectum and the anal canal, which are both parts of the digestive system.

Etymology

The term "inferior rectal veins" is derived from the Latin words "inferior" (meaning "lower"), "rectus" (meaning "straight"), and "vena" (meaning "vein"). This name is used to distinguish these veins from the superior rectal vein, which is located higher up in the rectum.

Anatomy

The inferior rectal veins originate from the hemorrhoidal plexus, a network of veins located in the anal canal and lower rectum. They exit the pelvic cavity through the pudendal canal, a passage in the pelvic floor, and drain into the internal pudendal veins.

The inferior rectal veins are accompanied along their course by the inferior rectal arteries and inferior rectal nerves, which supply blood and nerve signals to the same region.

Clinical significance

Inferior rectal veins are clinically significant because they can become enlarged and swollen, leading to a condition known as hemorrhoids. Hemorrhoids can cause symptoms such as pain, itching, and bleeding in the anal area.

See also

• Superior rectal veins
• Middle rectal veins
• Hemorrhoidal plexus
• Pudendal canal
• Internal pudendal veins

References

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