the changes observed in the tunica mucosa structure and indices of the cellular activity [ mitotic index , nuclear volumes , rna content , alkaline phosphatase ( aph ) , acid phosphatase ( acph ) , succinic dehydrogenase ( sdg ) , lactate dehydrogenase ( ldg ) activity ] make it possible to distinguish 3 periods in the process of the small intestine tunica mucosa embryonal development : 1 - period of the germinal differentiation , 2 - prespecific and 3 - specific differentiation period , the latter is characterized by common signs for the man and the rat .
C0007634
cellular
C0007589
differentiation