The basic unit of the thyroid gland is the follicle. The thyroid gland captures dietary iodine, synthesizes thyroid hormone from it, and stores thyroid hormone until it is needed. Colloid, the material in the center of the follicles, stores thyroid hormone in a large protein called thyroglobulin.
Greensburg is a town in and the parish seat of St. Helena Parish, Louisiana, United States. The population was 718 at the 2010 census. It is part of the Baton Rouge Metropolitan Statistical Area. Greensburg is one of the oldest towns in Louisiana.
GET DIRECTIONS. Situated along the banks of the Green River upon lush green landscape, the quaint little city of Greensburg offers several historic places listed on the National Register. Visit and appreciate the old world style architecture of our courthouse on the square, clerks office, Allens Inn and the Independent Bank of Greensburg.