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Postnatální změny střeva králíka.
ŠTĚCHOVÁ, Kristýna
The small intestine is an important organ of the gastrointestinal tract. It is undergoing the influence of internal and external factors significant adaptive changes in the postnatal life. The aim of the thesis was to provide information about the morphometric changes in various sections of the small intestine of rabbits during the 19 days of postnatal development study. It was measured length of the individual sections of the small intestine at the age of 0, 5, 10, 14 and 19 days and it was sampled for morphometric examination mucosa. The length and width of villi, the depth of crypts of Lieberkühn and the height of enterocytes were evaluated under a light microscope. The average length of the small intestine was 61,4?2,4 cm at new born rabbits and when they were 19 days old it was 106,5?9,1 cm. The most noticeable increase was observed at ileum (124,4 %). On the contrary the lowest increase was observed at jejunum (63,1 %). In the duration of 19 days development of the rabbits, the highest size of villi and crypts of Lieberkühn was in duodenum, on the other hand the lowest was in jejunum. We could also observe temporary stagnation of the growth of enterocytes in all parts of the small intestine. From the results follow that in the duration of the early postnatal development, it is duodenum, which is able to adapt in the fastest way
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