ANAT 216 Lecture Notes - Lecture 3: Inferior Thyroid Veins, Inferior Thyroid Artery, Superior Thyroid Artery
2 Oct 2017
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Endocrine system 2 (reading material chapter 19: pages 512-522) Thyroid gland: location front of the neck just below the thyroid cartilage (a large massive shield of cartilage that sits in front of voice box aka adams apple) Hollow ball-like structures wall of simple cuboidal epithelial cells called follicular cells. Cavity stores the material colloid (consists of fibroglobulin) follicular cells produce thyroglobulin (globular protein that is porduced and secreted by follicular cells) T3 are produced this all happens within the cavity thyroid hormones: Stored until thyroid follicles are stimulated by tsh coming from pars vistalis. Found associated with follicular cells and in small clusters between the follicles themselves. Much larger than cuboidal follicular cell and cytoplasm doesn"t stain very intensely. When it was first discovefred the cell didn"t stain at all (thus called clear cell) Regulate calcium ion conc by location, size produces calcitonin: functions to lower calcium concentration. Stimulate the excretion of ca by the kidneys.
