気道及び食道のリンパ管

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書誌事項

タイトル別名
  • The Lymphatics of Respiratory Passages and Esophagus
  • キドウ オヨビ ショクドウ ノ リンパカン ヒ ホンキカン ショクドウ カガクカイ ダイ19カイ ガクジュツ コウエンカイ トクベツ コウエン

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説明

There are many detailed studies on the collecting lymphatic vessels from respiratory passages and the esophagus to the regional lymph nodes. Accordingly, I will describe here the lymphatics of the mucosa of the trachea and the esophagus.<BR>The lymphatic system of the mucosa both in the esophagus and the trachea consists of superficial and deep networks of lymphatic capillaries. The superficial network is not situated in the same level of the blood capillary network which lies close to the epithelium, but below the latter. This is a general rule.<BR>The superficial network has dense meshes elongated longitudinally along the tube, while the deep network has coarse meshes which are also elongated longitudinally in the esophagus and paries membranacea tracheae, but directed obliquely in the mucosa of the trachea covering the cartilages.<BR>In the esophagus the superficial network exists in the lamina propria and the deep network is situated close to the muscularis mucosae, while in the trachea the former is located close to the elastic layer and the latter underneath the layer.<BR>Electron microscopically investigated, the structure of the lymphatic capillary in the mucosa of the esophagus shows no great difference from that of the trachea, with the wall composed of a single layer of extremely thin endothelial cells and a basement membrane with breaks or lack here and there. The endothelial cell junctions are wider and looser than those of blood vessels. Further, there are frequently seen endothelial cell junctions that are completely open. In lymphatic vessls valves are discernible and besides similar endothelium and basement membrane, connective tissue and smooth muscles take part in the wall.

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