Thyroid Hormone Tutorial: the Thyroid and Thyroid Hormones
نویسنده
چکیده
During fetal development, the thyroid originates in the back of the tongue before migrating to the front of the neck, just below the larynx. The largest gland in the neck, a normal thyroid is a firm, reddish brown, smooth gland and weighs less than one ounce and is made up of two large lobes that lie along either side of the trachea. These lobes are joined together by a narrow band of thyroid tissue, known as the isthmus. It is surrounded by fibrous capsule that projects into the gland, dividing it into many small lobules. The thyroid has very high blood flow based on weight of organ and consists of closely packed follicles surrounded by capillaries.
منابع مشابه
Seasonal change of thyroid histomorphological structure and hormone production in yellowfin seabream (Acanthopagrus latus) in the Persian Gulf
Seasonal changes of the thyroid gland structure and hormones secretion was examined in yellowfin seabream (Acanthopagrus latus) in the northwest of Persian Gulf (Musa creek). Thyroid gland composed of follicles scattered around the ventral aorta, near the gills. Follicular cells varied according to secretion of the gland during warm and cold seasons. Thyroid hormones (Triidothyronine [T3] and ...
متن کاملEffect of Aerobic Exercise on Thyroid Hormones and Quality of Life in Obese Postmenopausal Women
ABSTRACT Background and objectives: Studies have shown that exercise can affect hormone secretion and some metabolic and endocrine functions. The aim of this study was to assess the effect of eight weeks of aerobic training on thyroid hormones and quality of life in obese postmenopausal women. Methods: In this semi-experimental study, 21 obese (body mass index >30 Kg/m2)...
متن کاملSeasonal change of thyroid histomorphological structure and hormone production in yellowfin seabream (Acanthopagrus latus) in the Persian Gulf
Seasonal changes of the thyroid gland structure and hormones secretion was examined in yellowfin seabream (Acanthopagrus latus) in the northwest of Persian Gulf (Musa creek). Thyroid gland composed of follicles scattered around the ventral aorta, near the gills. Follicular cells varied according to secretion of the gland during warm and cold seasons. Thyroid hormones (Triidothyronine [...
متن کاملThe Relationship between Thyroid Hormones, Vitamin D and Fasting Blood Glucose Level During Summer and Winter in Nondiabetic Adults
Background and Aims: 25-hydroxy vitamin D3 is recognized to be an essential element for healthy body; however, its deficiency has been identified as a risk factor for thyroid disease, diabetes mellitus and other autoimmune diseases and infectious diseases. Thyroid disease is common in the general population that its prevalence increases proportional to age. Subjects with poorly controlled diabe...
متن کاملCalculation of Thyroid Dose with Planner System and Evaluation of Thyroid Function after Radiotherapy for Patients with Breast Cancer
Background: Much research has widely been conducted into thyroid hormones levels following radiotherapy for breast cancer. Consequently, in this study, we evaluated to relate the rate of thyroid hormones levels with the dose distribution among breast cancer patients.Material and Methods: Thirty patients were treated with 4-field breast cancer radiotherapy. The dose volume histograms, the volume...
متن کاملGrowth and Development in a incidentally diagnosed Resistance to Thyroid Hormone
Resistance to thyroid hormone is an uncommon condition. We report the clinical and laboratory findings of a case with both resistance to thyroid hormone and, a reduced capacity to produce and respond to thyroid hormone. RTH is a disorder characterized by elevated circulating thyroid hormones, state of non-suppressed pituitary TSH secretion and refractoriness to hormone action in peripheral tiss...
متن کامل