・概 要
・構 造 （粘 膜）
・区 分
・周辺との位置関係
・脈管/神経
・関連語句
・Wikipedia
・イラスト掲載サイト
・「気管分岐部の位置は、大人では第2肋軟骨の高さ（胸骨角の高さ）に相当するが、
以下は「Wikipedia」の解説文となる。
The upper part of trachea receives and drains blood through the inferior thyroid arteries and veins; the lower trachea receives blood from bronchial arteries. Arteries that supply the trachea do so via small branches that supply the trachea from the sides. As the branches approach the wall of the trachea, they split into inferior and superior branches, which join with the branches of the arteries above and below; these then split into branches that supply the anterior and posterior parts of the trachea.
The inferior thyroid arteries arise just below the isthmus of the thyroid, which sits atop the trachea. These arteries join (anastamoses) with ascending branches of the bronchial arteries, which are direct branches from the aorta, to supply blood to the trachea.
The lymphatic vessels of the trachea drain into the pretracheal nodes that lie in front of the trachea, and paratracheal lymph nodes that lie beside it.
【語句】
・inferior thyroid arteries：下甲状腺動脈 ・bronchial arteries：気管支動脈 ・isthmus：峡部 ・anastamouse：吻合する ・aorta：大動脈 ・paratracheal lymph node：気管傍リンパ節 ・atop：頂上 ・lymphatic vessels：リンパ管 ・pretracheal nodes：気管前リンパ節
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