每日口說挑戰 淋巴系統是怎麼運作的？一起來認識吧！(The Lymphatic System Overview)

今日挑戰句子

Lymphatic vessels begin as lymphatic capillaries made of overlapping endothelial cells.

淋巴管起源於淋巴微管，由管壁內皮細胞重疊而成。