Daɣ awatay wan 1838, Schwann issinta efes n inasjam win amarad n as (1) tijittawt ta oharan addinat amos azar tolas (2) as izirwan n awadim fuk ilan samalan fuk wi tamudre kuddeɣ as war ilkem i anasjum (3) izirwan fuk izjaran id tazunt n izirwan iyyad