3)Function a. Selected permeability and exchange of material b, Synthesis(F VIll Rag, endothelin, ET and PG2) and metabolism(angiotensin angiotensin I)activity C. Anti-blood coagulate3) Function: a. Selected permeability and exchange of material b. Synthesis(F VIII Rag, endothelin, ET and PGI2 ) and metabolism(angiotensin I→angiotensin II) activity c. Anti-blood coagulate