Thyroid gland, Biology

THYROID GLAND -

  • It develops from the endoderm of the embryo.
  • The thyroid gland is the largest endocrine gland located anterior to the thyroid cartilage of the larynx in the neck.
  • It is bilobed organ. The two lobes are connected by a narrow structure called isthmus.
  • The microscopic structure of the thyroid gland shows thyroid follicles composed of cubical epithelium and filled with a hormonous material called colloid.
  • Small amount of loose connective tissue forms stroma of the gland. Besides containing blood capillaries, the stroma contains small clusters of specialized parafollicular cells or 'c' cells.
  • The thyroid gland can store enough hormones in the form of colloid to supply the body (for about two months).

1608_parathyroid gland.png 1812_thyroid gland.png

Posted Date: 10/2/2012 6:41:50 AM | Location : United States







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