Straight arterioles (a. recta) are vessels that supply blood to the rectum and anal canal. They are branches of the internal iliac artery and are located in close proximity to the rectum.
Straight arterioles have a length of 3 to 5 cm and a diameter of 0.5 to 1 mm. They pass through the wall of the rectum and anal canal, where they branch into smaller vessels. In the anal canal, straight arterioles connect with other arteries, including the external and internal pudendal arteries.
The main function of the rectal arterioles is to supply blood to the rectum and anal canal. They are also involved in regulating temperature in these areas as they can release heat in the form of heat. In addition, straight arterioles may be involved in the processes of inflammation and tissue regeneration in the rectum and anal canal.
Diseases associated with arterioles recta include anal fissures, hemorrhoids, anal fistulas and other diseases associated with the rectum and anal canal. Improper functioning of the rectal arterioles can lead to disruption of the blood supply and nutrition of the tissues of the rectum and anorectal area, which can lead to various diseases.
In general, the rectal arterioles play an important role in the functioning of the rectum and anal canal and must be well studied to understand the processes associated with these areas.