has part has part has_part has target end location endocytosis vesicle endocytosis biological_process GO:0006897 endocytic import into cell A vesicle-mediated transport process in which cells take up external materials or membrane constituents by the invagination of a part of the plasma membrane to form a new membrane-bounded vesicle. Wikipedia:Endocytosis vesicle budding from membrane membrane invagination vesicle-mediated transport cytoplasmic vesicle import into cell