part of part of in taxon results in formation of anatomical entity morphogenesis of embryonic epithelium anatomical structure formation involved in morphogenesis mammary gland cord formation biological_process 2009-05-18T08:57:58Z The process in which the mammary gland cord forms by elongation of the mammary bud. The cord is formed once the elongating bud breaks through the mesenchyme and reaches the fat pad. GO:0060616 mammary gland sprout formation dph mammary gland cord morphogenesis epithelial tube formation Mammalia mammary gland cord