Abstract Clearance of protein waste products from the brain is accomplished by a combination of advection and diffusion in cerebrospinal fluid (CSF) and interstitial fluid (ISF). In the glymphatic model. there is a flow of ISF in the interstitial space. and both advection and diffusion occur there. https://www.hindigyanvishv.com/best-buy-Big-Sur-After-Rain-Hand-Soap-amazing-deal/