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The human thyroid (tan), as viewed from the front; and arteries (red) supplying the gland. The thyroid gland is a butterfly-shaped gland located in the neck below the Adam's apple. The thyroid, or thyroid gland, is an endocrine gland in vertebrates. In humans, it is in the neck and consists of two connected lobes.
The thyroid cartilage is a hyaline cartilage structure that sits in front of the larynx and above the thyroid gland. The cartilage is composed of two halves, which meet in the middle at a peak called the laryngeal prominence, also called the Adam's apple. [1] In the midline above the prominence is the superior thyroid notch.
Anatomical terminology. [edit on Wikidata] The endocrine system[1] is a messenger system in an organism comprising feedback loops of hormones that are released by internal glands directly into the circulatory system and that target and regulate distant organs. In vertebrates, the hypothalamus is the neural control center for all endocrine systems.
Anatomy. The cricoid cartilage is the only laryngeal cartilage to form a complete circle around the airway. It is smaller yet thicker and tougher than the thyroid cartilage above. [1] It articulates superiorly [citation needed] with the thyroid cartilage, and the paired arytenoid cartilage. Inferiorly, the trachea attaches onto it. [1]
Thyroid hormones are any hormones produced and released by the thyroid gland, namely triiodothyronine (T3) and thyroxine (T4). They are tyrosine -based hormones that are primarily responsible for regulation of metabolism. T 3 and T 4 are partially composed of iodine, derived from food. [2] A deficiency of iodine leads to decreased production of ...
Thyroid follicular cells (also called thyroid epithelial cells or thyrocytes[1]) are the major cell type in the thyroid gland, and are responsible for the production and secretion of the thyroid hormones thyroxine (T 4) and triiodothyronine (T 3). They form the single layer of cuboidal epithelium that makes up the outer structure of the almost ...
Thyroid ultrasonography is the modality of choice for thyroid evaluation. [1] Yet, focal and diffuse thyroid abnormalities [2] are commonly encountered during the interpretation of computed tomography (CT) exams performed for various clinical purposes. [1] For example, CT often detects incidental thyroid nodules (ITNs).
The branches to the gland are generally two in number. One, the larger, supplies principally the anterior surface; on the isthmus of the gland it connects with the corresponding artery of the opposite side. A second branch descends on the posterior surface of the gland and anastomoses with the inferior thyroid artery. Besides the arteries ...
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