Tubuls are present in various situations and transformations almost in all parts of composition.
Ngwakọta kpụ ọkụ n'ọnụ na mgbada bụ ihe fọrọ nke nta ka ọ bụrụ ọnọdụ dị n'ọtụtụ ebe, ha na-agbawa obi maka akụkụ niile nke ọ bụla.