Simplify the following text for a Grade 7 native English-speaking person.
Original: Not to be confused with the parathyroid glands In vertebrate anatomy , the thyroid gland or simply , the thyroid ( Ë Î aÉ rÉ '' É d ... ) , is one of the largest endocrine glands in the body .
Simplified: The thyroid is one of the largest endocrine glands in the body .