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.
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.This can be caused by an underactive thyroid, a condition also referred to as hypothyroidism. Symptoms. Hyperthyroidism often causes the thyroid gland, which is located at the front of the neck, to become noticeably larger.oo little thyroxine reverses the process and slows down the body's functions. This can be caused by an underactive thyroid, a condition also referred to as hypothyroidism. Symptoms. Hyperthyroidism often causes the thyroid gland, which is located at the front of the neck, to become noticeably larger.