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Thyroid&Parathyroid
SRGT 1441 Lecture
| Question | Answer |
|---|---|
| Thyroid | Gland grouped with the endocrine system. Function is to regulate the body's metabolism. |
| Anatomy of Thyroid | Located in the neck, located below the thyroid cartilage. |
| Cross Section of Thyroid | Enclosed in a thin layer of pretracheal or visceral fascia, which also includes the trachea and esophagus. |
| Muscles of the Neck | Most of the anterolateral surface of the neck is covered by the thin platysma muscles. |
| Thyroid is covered by: | Sternohyoid (Strap), Sternothyroid (Strap), Omohyoid muscles. |
| Arterial blood supply | Superior thyroid artery & inferior thyroid artery |
| Superior thyroid artery | Supplied by the external carotid artery |
| Inferior thyroid artery | supplied by the thyrocervical trunk of the subclavian artery. |
| Venous Drainage | Superior thyroid vein, middle thyroid vein, inferior thyroid vein |
| Nerve Supply | Superior laryngeal nerve & Recurrent laryngeal nerve |
| Superior laryngeal nerve | on each side of the thyroid; lies in close proximity to the sup. thyroid artery |
| Recurrent laryngeal nerve | supplies the vocal cords & is in close association with the inferior thyroid artery. |
| Hormones | T4=Thyroxine, T3=Triiodothyronine, Calcitonin |
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