Fig. 1From: Recent advances of exosomal circRNAs in cancer and their potential clinical applicationsStructural schematic diagram of circRNA and exosomes. A The formation process of covalently closed, uninterrupted loop circRNAs and their biological functions; BÂ the lipid bilayer structure of exosomes and its molecules contents; C Exosomes mediate the communications among different type cellsBack to article page