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Respiratory bud : ウィキペディア英語版 | Respiratory bud
The respiratory bud is an embryological structure of endodermal origin that develops into organs of the respiratory system, such as the larynx, trachea and lungs. ==Early stage==
In the fourth week of development, the respiratory bud starts to grow from the ventral (front) side of the midforegut into the mesoderm that surrounds it, taking the form of a pouch. Around the 28th day, two lung buds develop on the sides of the distal part of the respiratory bud and begin to grow laterally, expanding into the primitive pleural cavity.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Respiratory bud」の詳細全文を読む
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