KnowraThyroidLinked fromLinked fromThe 17 pages that link to Thyroid, each with the reason it gives.All 17Broader topic 3Related 7Narrower topic 5Compared with 2HypothyroidismNarrower topic: It is the main source of the hormones deficient in primary hypothyroidism.Hypothalamic–pituitary–thyroid axisNarrower topic: It is the target gland whose hormone output the axis regulates.LevothyroxineNarrower topic: Levothyroxine replaces hormone output when this gland cannot meet the body's needs.ThyroxineNarrower topic: Follicular cells in this gland synthesize and release T4.TriiodothyronineNarrower topic: It secretes T3 directly and produces most circulating T4.