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Audio Video Interleaved Video  |  1998-02-12  |  3.7 MB  |  400x400  |  15fps  |  30 seconds
Transcription: The thyroid gland, located at the front of the throat, comprises two flaps, one on each side of the trachea, connected to each other by a small bridge called the isthmus. The thyroid gland produces two iodine-containing hormones called tetraiodothyronin and triiodothyronin, which not only influence the metabolism but are also crucial to physical growth, temperature regulation and development.