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Joined Oct 19, 2011
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11/04/11 at 01:47The thyroid is a gland located on the anterior (front) portion of the neck attached to the upper part of the trachea (windpipe). The thyroid is a bi-lobed gland. This gland is small in size, about 4 centimeters long and 1-2 centimeters wide. ?
The thyroid produces and secretes biologically important hormones. Tissue in the thyroid is made up of two different kinds of cells: follicular and parafollicular cells. The thyroid is composed mostly of follicular cells which secrete T3 and T4 hormones. The T4