In the 1st week, pronounced ACHE-positive nerve fibres were observed only in the node hilum in the periarterial topography. In the 2nd week of postnatal development the fibres penetrated, along with the branched vessels, into the node medulla. In the period from the 3rd untill the 6th week the fibres were well-developed in the paracortical region and propagated in the direction of the node cortex. They were not observed in lymphatic nodules. From the 5th month onwards a considerable reduction in ACHE-positive innervation occured.
Key words: lymph node; ACHE-positive innervation; rat
This article is dedicated to the memory of the late Prof. P. P o p e s k o, DVM, DSc on the seventieth anniversary of his birth.
Folia Veterinaria / 1995