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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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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).
1 mar 2009 · Physiology. 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.
Thyroid. Scanning electron micrograph (SEM) of thyroid follicles when fractured. Several follicles are broken open while the colloid has been removed. The spherical to ovoid shape of the follicles is clearly shown. Parafollicular cells are also seen between the follicles.
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
Histology Revolution: from inefficient, two-dimensional, and low-resolution techniques to high-throughput, three-dimensional and high-resolution techniques
The thyroid is characterized by three main histological features: colloid containing follicles, follicular epithelium, and parafollicular cells. The follicles secrete thyroxin and triiodothyronine.
