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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).
Histology of the thyroid - thyroid follicles, colloid, follicular cells, and parafollicular cells.
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
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.
Histology Revolution: from inefficient, two-dimensional, and low-resolution techniques to high-throughput, three-dimensional and high-resolution techniques
This is a slide of the human pituitary stained with H&E. By eye, note the overall shape of the gland and the conspicuously different staining properties of the pars distalis (anterior lobe or adenohypophysis) and the pars nervosa (posterior lobe or neurohypophysis). At low power, survey the section.
The thyroid has a characteristic appearance under H&E stain. Most noticeable are the follicles, composed of a ring of cuboidal epithelial cells called principal cells bounded by a basement membrane and surrounding a lumen filled with pink-staining colloid that consists primarily of thyroglobulin.
