问内环境指的是血浆、组织液、淋巴。但它们三者之间的关系,一些教科书上写法不一,主要有以下三种表示: 以上三种表示法,到底哪种正确? (湖南省邵阳县九中黎辉) 答第二种表示法是正确的。第一种和第三种用箭头表示血管内的血浆可直接进入毛细淋巴管形成淋巴,这是不正确的,因为毛细血管中的血浆只能透过血管壁,进入细胞间隙,形成组织液。而组织液的90％都被毛细血管重吸收,只有10％透入毛细淋巴管,形成淋巴。毛细血管中的血浆不能直接透入毛细淋巴管形成 Asked the internal environment refers to the plasma, tissue fluid, lymph. However, the relationship between them, some written in different textbooks, mainly in the following three representations: The above three representations, in the end what kind of correct? (Shaoyang County, nine in Li Hui) A second representation is correct. The first and third arrows indicate that the blood vessels in the bloodstream can directly enter the lymphatic capillaries to form lymphatics, which is not correct because the capillaries only pass through the blood vessel wall and enter the interstitial space to form interstitial fluid. While 90% of tissue fluid is reabsorbed by capillaries, only 10% penetrate the lymphatic capillaries to form lymph. Plasma in the capillaries can not penetrate directly into the lymphatic capillaries