Answer: The correct answer is : b) Thyroid follicles
Step-by-step explanation:
Thyroid hormones are primarily stored in spherical structures called thyroid follicles. These follicles are found within the thyroid gland, a butterfly-shaped gland located in the neck region. Thyroid follicles range in size from 50 to 500 µm, and they play a crucial role in the production, storage, and release of thyroid hormones.
Inside each thyroid follicle, there is a single layer of follicular cells that surround a central space called the colloid. The colloid contains a gel-like substance known as thyroglobulin, which serves as a storage form for thyroid hormones. When the body requires thyroid hormones, the thyroglobulin is broken down and the hormones are released into the bloodstream.
The thyroid follicles, with their spherical shape and ability to store thyroid hormones, are essential for maintaining proper hormone levels in the body. Therefore, option b) Thyroid follicles is the correct answer.