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.
Other causes of an overactive thyroid can include inflammation of the thyroid due to viruses or bacterial infections. Also, postpartum hyperthyroidism affects women immediately after pregnancy. This is one of the most common postpartum health disorders, and it affects between ten and twenty percent of women.
About Hyperthyroidism. The thyroid gland is a part of the body's endocrine (hormone) system â which is made up of the glands that help regulate many of the body's different functions. An overactive thyroid produces too much of the thyroid hormone thyroxine, which causes some of these functions to speed up.Hyperthyroidism is the medical term for an overactive thyroid gland. Too little thyroxine reverses the process and slows down the body's functions.n overactive thyroid produces too much of the thyroid hormone thyroxine, which causes some of these functions to speed up. Hyperthyroidism is the medical term for an overactive thyroid gland.