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SRGT 1441 Lecture

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
Created by: 504662600