Thyroid Follicle

Thyroid Follicle

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Credit: ANATOMICAL TRAVELOGUE/SCIENCE PHOTO LIBRARY

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Caption: The thyroid gland, located on the anterior aspect of the trachea regulates the metabolism and maintains of blood calcium levels. The thyroid produces hormones, tri-iodothyronine (T3) and tetra-iodothyronine (T4), which regulate basal metabolic rate and blood calcium levels respectively. The thyroid is unique to all endocrine glands in that it stores its product in fluid-filled pockets called follicles, until its product is needed. The pituitary gland triggers the thyroid to synthesize hormones from the colloid, a reservoir within the follicle. The thyroid then releases its products, T3 and T4, directly into the bloodstream via surrounding vessels.

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Keywords: anatomical, anatomical illustration, anatomical illustrations, anatomy, basal metabolic rate, basal metabolic rates, basal metabolism, blood, blood calcium, body scans, calcitonin, calcium, chemical, endocrine system, follicle, glands, homeostasis, hormonal, hormone, hypothalami, hypothalamus, illustration, medical, medical illustrations, metabolic, metabolic rates, metabolism, metabolize, parathyroid, parathyroid glands, pineal, pineal gland, pineal glands, pituitary gland, t3, t4, thyroid, thyroid follicle, thyroid follicles, thyroid gland, tri-iodothyro

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