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30 paź 2023 · The thyroid gland is a bilobular endocrine gland that is found in the neck, anterior and inferior to the larynx. Grossly, the gland appears brownish-red and the left and right lobes are connected by an isthmus. The main purpose of this organ is to produce, store and secrete the iodine-based hormones triiodothyronine (T3) and thyroxine (T4).
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Thyroid. The thyroid gland is a bilobed endocrine gland. It is unique in that it stores its hormones bound to an extracellular pool of protein (colloid). Stroma Capsule - enclosed by a thin layer of connective tissue. Trabeculae - connective tissue extends inwards from the capsule to partially outline irregular lobes and lobules.
5 gru 2022 · The thyroid follicles are the structural and functional units of a thyroid gland. These are spherical, and the wall is made up of a large number of cuboidal cells, the follicular cells. These follicular cells are the derivates of the endoderm and secrete thyroid hormone.
14 cze 2023 · Histology: Cells: thyrocytes (synthesize thyroglobulin from which T3 and T4 are released), parafollicular (C) cells (secrete calcitonine) Functional unit: thyroid follicle - central lumen filled with colloid (storage of thyroglobuline) surrounded by thyrocytes and C-cells Endocrine control
1 mar 2009 · Purpose of thyroid gland is to produce T4 and T3, which regulate metabolism, increase protein synthesis and increase oxygen consumption in all cells in body; T4 and T3 are also important for growth and development, and maturation of peripheral and central nervous system.
19 lip 2016 · The functional unit of the thyroid gland is the thyroid follicle, which is composed of follicular cells and intrafollicular colloid. The size and shape of thyroid follicles and the height of the follicular epithelium vary depending on the thyroid’s functional activity.
5 gru 2022 · The thyroid gland is a richly vascular organ supplied by the superior and inferior thyroid arteries and sometimes by an additional artery known as the thyroidea ima artery (see Image. The Thyroid Artery). The venous drainage is by superior, middle, and inferior thyroid veins.