What is one major orgain in the endocrine system?

One major organ in the endocrine system is the thyroid gland. Located in the neck, it produces hormones such as thyroxine (T4) and triiodothyronine (T3), which regulate metabolism, energy levels, and overall growth and development. The thyroid plays a crucial role in maintaining the body's metabolic rate and is essential for proper functioning of various bodily systems.