…A small endodermal endocrine organ formed from a protrusion of the pharyngeal epithelium. It is present in all vertebrates, but in some animal classes it may be one or two, and in some fish it may be many and scattered. The endostyle of the sea squirt and lamprey larvae is phylogenetically homologous to the thyroid gland. Histologically, the thyroid gland is a group of follicles. The thyroid hormones secreted from the follicles are thyroxine (also called thyroxine, abbreviated as T 4 ) and triiodothyronine (also called triiodothyronine).… *Some of the terminology that refers to "suppurative thyroiditis" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…咽頭上皮の突起からできる小さい内胚葉性の内分泌器官で,脊椎動物すべてに存在するが,動物の綱によって1個あるいは2個であったり,さらに魚類の中には多数に分かれて散在するものもある。ホヤやヤツメウナギ幼生の内柱endostyleが系統発生学的に甲状腺と相同のものである。甲状腺は組織学的にみると濾胞の集団である。濾胞から分泌される甲状腺ホルモンにはチロキシンthyroxine(サイロキシンともいう。T4と略記)とトリヨードチロニンtriiodothyronine(トリヨードサイロニンともいう。… ※「化膿性甲状腺炎」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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