Typically veins are generally wider than arteries, and therefore the pressure is lower. Capillaries are tiny vessels, so repsent high resistance to the incoming blood, so the rate of blood flow through will be quite low. All blood from the artery eventually passes through capillaries and into the vein.
Graves' disease. Graves' disease is the most common cause of overactive thyroid. It can run in families and can occur at any age, although it is most common in women aged 20-40 years old. You are more likely to develop Graves' disease if you smoke. Graves' disease is an autoimmune condition.
1 Treatment is not necessary unless the goiter is large and causes symptoms (there are often no symptoms). 2  Synthetic thyroid hormone is a treatment for underactive thyroid, while anti-thyroid drugs are options for an overactive gland.yperthyroidism is also a cause of goiter-from an overactive thyroid gland, which produces too much thyroid hormone. This usually happens as a result of Graves' disease, also an autoimmune disorder in which the body's immunity turns on itself and attacks the thyroid gland, causing it to swell. 3.