The term "plexus haemorrhoidalis medius" refers to a network of blood vessels found in the middle region of the anal canal, which is associated with hemorrhoids. A hemorrhoid, commonly known as a pile, is a swollen and inflamed vein located in the lower rectum or anus.
The plexus haemorrhoidalis medius is one of three main plexuses of veins identified within the anal canal. It lies between the internal and external hemorrhoidal plexuses. This intricate vascular network comprises numerous interconnected veins and capillaries, forming a complex network.
The function of the plexus haemorrhoidalis medius is to facilitate the blood supply to the anal region. During normal conditions, it is responsible for ensuring proper blood circulation to the anus and surrounding tissues. However, certain factors such as increased pressure or straining during bowel movements can cause these blood vessels to become engorged, leading to the formation of hemorrhoids.
When the plexus haemorrhoidalis medius becomes dilated or swollen due to various reasons such as constipation, pregnancy, or prolonged sitting, it can lead to discomfort, itching, pain, and sometimes bleeding. Hemorrhoids are classified into internal (within the rectum) or external (under the skin around the anus) based on their location.
In summary, the plexus haemorrhoidalis medius is an extensive network of blood vessels in the middle region of the anal canal that plays a crucial role in ensuring proper blood supply to the anal region. When these blood vessels become swollen or inflamed, they can cause the formation of hemorrhoids, resulting in symptoms such as pain, itching, and bleeding.
