[The quantitative and qualitative analysis fro submandibular gland of human being.].

30 cases of submandibular gland tissue were determined quantitatively in this article.It is noticed that there was no great change during and after the birth .But at the adolesence stage,the data began to change was steady in adult state.At pressenium,the change speed of mean was faster.Observation under microscope:the submandibular gland in 7-8 month old embryo was developed basically and similar to newborn.It had good blood supply and secrete function.Adipose tissue,which is important indication of changed with age in saliva gland,did not exit in submandibular gland of human being.In addition.it is normal that there were a few lymphatic cells and plasmocytes with secrete SIgA in the gland and is relating with protective principle of normal environment.