The thyroid gland is composed of: A. follicles B. stromal tissue C. trachea D. Both (1) and (2)

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The thyroid gland is primarily composed of two types of cells: follicular cells and parafollicular cells. Given this, we can analyze the options provided to determine the correct answer.

  • Follicles: These are structures within the thyroid gland. The term "follicles" here refers to the groups of follicular cells that form the main functional units of the thyroid.
  • Stromal tissue: This refers broadly to the connective tissue which supports the gland's structure and may be present in various tissues.
  • Trachea: This is a separate anatomical structure located below the thyroid gland and not part of it.
  • Both (1) and (2): This includes both follicles and stromal tissue.

From the options given:

  1. Follicles (Option A) are indeed a part of the thyroid gland.
  2. Stromal tissue (Option B) also forms part of the structure supporting the thyroid gland.

Since the thyroid gland is composed of both follicles and stromal tissue, the correct answer is:

D. Both (1) and (2).

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