MORPHOLOGICAL AND HISTOLOGICAL ANALYSIS OF THE MANDIBULAR GLAND AND SUBLINGUAL GLANDS IN PRENATAL PERIOD OF THE PIG

摘要

The research was carried out on a group of 119 foetuses aged from the 36*' to 120 d of prenatal life. The "cross-section of population" method was used. The subjects were divided into six groups for statistical assessment. The development of the salivary glands was evaluated by using anatomo-topographical methods: skeletopy, synthopy, and holotopy. The structural characteristics of the vascularisation and innervations were examined by morphological, radiological, and histological methods. The development and morphology of the mandibular and sublingual glands was correlated with the development of the surrounding organs. The most intensive growth of salivary glands was observed in the 10*-11''' week of prenatal life and was connected with the isometric phase. The histological structures of the glands changed according to the age of the foetus. The connective tissue of the glands diminished and the excretory parts increased during pregnancy. The position of the foetus in the uterus and its sex had noinfluence on morphology and the development of mandibular and sublingual salivary glands.