Final answer:
Thrombosed vessels of the rectum are known surgically as hemorrhoids. Hemorrhoids occur when the veins in the rectum and anus become swollen and inflamed. Edema can be accompanied by varicose veins, especially in the legs.
Step-by-step explanation:
Thrombosed vessels of the rectum are surgically known as hemorrhoids. Hemorrhoids occur when the veins in the rectum and anus become swollen and inflamed.
The presence of excess tissue fluid around the cells can lead to a condition called edema, which can be accompanied by varicose veins, especially in the superficial veins of the legs.
Varicose veins are commonly found in the lower limbs and can be caused by defective valves allowing blood to accumulate within the veins, causing them to distend, twist, and become visible on the surface of the skin.