肺泡表面的活性物质肺里称为肺泡的微小气囊表面有一层像肥皂一样的活性物质,当你呼气而将二氧化碳从体内排出的时候,这种物质可令肺泡脆弱的薄膜(厚度不足0.5mm)不会黏连在一起。骨骼的供血机制供血的管道通过覆盖在骨骼上的薄薄一层薄膜进入骨骼内部,这层薄膜称为骨膜。如果没有这种循环,你可能会缺少免疫细胞,要是没有免疫 The alveolar surface of the active substance in the lungs called the alveolar microcapsule has a layer of soap-like active substance on the surface. When you exhale to expel the carbon dioxide from the body, this substance can make the alveolar fragile film (thickness less than 0.5mm Will not stick together. The blood supply system of the bones enters the bone through a thin layer of film covering the bones, which is called the periosteum. Without this cycle, you may lack immune cells, if not immunized