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Click on links to move to a specific region. Click on images to show that view. Use the toolbar to change the magnification and pan the displayed image. 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).
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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).
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.
Follicular (principal) Cells (blue) – luminal surface is domed and covered with projections. Parafollicular Cells (yellow) – small clusters between the follicles. Produce calcitonin which contributes to the lowering of blood calcium levels. Also known as C (clear) cells being lightly stained by H&E.
Describe the location and anatomy of the thyroid gland; Discuss the synthesis of triiodothyronine and thyroxine; Explain the role of thyroid hormones in the regulation of basal metabolism; Identify the hormone produced by the parafollicular cells of the thyroid
The thyroid is characterized by three main histological features: colloid containing follicles, follicular epithelium, and parafollicular cells. The follicles secrete thyroxin and triiodothyronine.
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.